165944080 has 40 divisors (see below), whose sum is σ = 402599232. Its totient is φ = 63490944.

The previous prime is 165944071. The next prime is 165944087. The reversal of 165944080 is 80449561.

It is a happy number.

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

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (165944087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43254 + ... + 46933.

Almost surely, 2^165944080 is an apocalyptic number.

165944080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165944080 is an abundant number, since it is smaller than the sum of its proper divisors (236655152).

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

165944080 is a wasteful number, since it uses less digits than its factorization.

165944080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90223 (or 90217 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 165944080 is about 12881.9284270640. The cubic root of 165944080 is about 549.5247464778.

The spelling of 165944080 in words is "one hundred sixty-five million, nine hundred forty-four thousand, eighty".