165753990 has 24 divisors (see below), whose sum is σ = 430960608. Its totient is φ = 44201040.

The previous prime is 165753989. The next prime is 165754003. The reversal of 165753990 is 99357561.

165753990 is digitally balanced in base 3, because in such base 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 (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 920766 + ... + 920945.

It is an arithmetic number, because the mean of its divisors is an integer number (17956692).

Almost surely, 2^165753990 is an apocalyptic number.

165753990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165753990 is an abundant number, since it is smaller than the sum of its proper divisors (265206618).

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

165753990 is a wasteful number, since it uses less digits than its factorization.

165753990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841724 (or 1841721 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 45.

The square root of 165753990 is about 12874.5481474108. The cubic root of 165753990 is about 549.3148382752.

The spelling of 165753990 in words is "one hundred sixty-five million, seven hundred fifty-three thousand, nine hundred ninety".