165089680 has 40 divisors (see below), whose sum is σ = 438668352. Its totient is φ = 56601984.

The previous prime is 165089633. The next prime is 165089681. The reversal of 165089680 is 86980561.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (165089681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146842 + ... + 147961.

Almost surely, 2^165089680 is an apocalyptic number.

165089680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165089680 is an abundant number, since it is smaller than the sum of its proper divisors (273578672).

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

165089680 is a wasteful number, since it uses less digits than its factorization.

165089680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294823 (or 294817 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 165089680 is about 12848.7228937354. The cubic root of 165089680 is about 548.5800064280.

The spelling of 165089680 in words is "one hundred sixty-five million, eighty-nine thousand, six hundred eighty".