1663164612 has 18 divisors (see below), whose sum is σ = 4204110638. Its totient is φ = 554388192.

The previous prime is 1663164611. The next prime is 1663164617. The reversal of 1663164612 is 2164613661.

It is a happy number.

1663164612 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 1 + 646 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 977562756 + 685601856 = 31266^2 + 26184^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1663164612² = 5532233053218221088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 46199017 = 1663164612 / (1 + 6 + 6 + 3 + 1 + 6 + 4 + 6 + 1 + 2).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1663164611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23099473 + ... + 23099544.

Almost surely, 2^1663164612 is an apocalyptic number.

1663164612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1663164612 is an abundant number, since it is smaller than the sum of its proper divisors (2540946026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1663164612 is a wasteful number, since it uses less digits than its factorization.

1663164612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46199027 (or 46199022 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 1663164612 is about 40781.9152566429. The cubic root of 1663164612 is about 1184.8000901888.

The spelling of 1663164612 in words is "one billion, six hundred sixty-three million, one hundred sixty-four thousand, six hundred twelve".