165787992 has 32 divisors (see below), whose sum is σ = 460522800. Its totient is φ = 55262592.

The previous prime is 165787987. The next prime is 165788017. The reversal of 165787992 is 299787561.

165787992 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383553 + ... + 383984.

Almost surely, 2^165787992 is an apocalyptic number.

165787992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165787992 is an abundant number, since it is smaller than the sum of its proper divisors (294734808).

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

165787992 is a wasteful number, since it uses less digits than its factorization.

165787992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767552 (or 767542 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 165787992 is about 12875.8685920601. The cubic root of 165787992 is about 549.3523970013.

The spelling of 165787992 in words is "one hundred sixty-five million, seven hundred eighty-seven thousand, nine hundred ninety-two".