165755690 has 8 divisors (see below), whose sum is σ = 298360260. Its totient is φ = 66302272.

The previous prime is 165755663. The next prime is 165755713. The reversal of 165755690 is 96557561.

165755690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 154977601 + 10778089 = 12449^2 + 3283^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×165755690² = 54949897534752200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8287775 + ... + 8287794.

Almost surely, 2^165755690 is an apocalyptic number.

165755690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165755690 is a deficient number, since it is larger than the sum of its proper divisors (132604570).

165755690 is a wasteful number, since it uses less digits than its factorization.

165755690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16575576.

The product of its (nonzero) digits is 283500, while the sum is 44.

The square root of 165755690 is about 12874.6141689761. The cubic root of 165755690 is about 549.3167162231.

The spelling of 165755690 in words is "one hundred sixty-five million, seven hundred fifty-five thousand, six hundred ninety".