1663164 has 18 divisors (see below), whose sum is σ = 4204200. Its totient is φ = 554376.

The previous prime is 1663157. The next prime is 1663169. The reversal of 1663164 is 4613661.

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

It is a super-2 number, since 2×1663164² = 5532228981792, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663169) 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, 23064 + ... + 23135.

2^1663164 is an apocalyptic number.

It is an amenable number.

1663164 is an abundant number, since it is smaller than the sum of its proper divisors (2541036).

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

1663164 is a wasteful number, since it uses less digits than its factorization.

1663164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46209 (or 46204 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1663164 is about 1289.6371582736. The cubic root of 1663164 is about 118.4799944864.

The spelling of 1663164 in words is "one million, six hundred sixty-three thousand, one hundred sixty-four".