1663178112 has 96 divisors (see below), whose sum is σ = 4794126480. Its totient is φ = 553448448.

The previous prime is 1663178089. The next prime is 1663178113. The reversal of 1663178112 is 2118713661.

1663178112 is a `hidden beast` number, since 1 + 6 + 631 + 7 + 8 + 1 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1663178112² = 5532322864471769088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1663178113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1113238 + ... + 1114730.

Almost surely, 2^1663178112 is an apocalyptic number.

1663178112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1663178112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2397063240).

1663178112 is an abundant number, since it is smaller than the sum of its proper divisors (3130948368).

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

1663178112 is a wasteful number, since it uses less digits than its factorization.

1663178112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480 (or 2465 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 1663178112 is about 40782.0807708484. The cubic root of 1663178112 is about 1184.8032958763.

The spelling of 1663178112 in words is "one billion, six hundred sixty-three million, one hundred seventy-eight thousand, one hundred twelve".