165654994 has 16 divisors (see below), whose sum is σ = 255543768. Its totient is φ = 80479872.

The previous prime is 165654967. The next prime is 165655019. The reversal of 165654994 is 499456561.

It can be written as a sum of positive squares in 4 ways, for example, as 141300769 + 24354225 = 11887^2 + 4935^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93622 + ... + 95374.

Almost surely, 2^165654994 is an apocalyptic number.

165654994 is a deficient number, since it is larger than the sum of its proper divisors (89888774).

165654994 is a wasteful number, since it uses less digits than its factorization.

165654994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069.

The product of its digits is 1166400, while the sum is 49.

The square root of 165654994 is about 12870.7029334066. The cubic root of 165654994 is about 549.2054576978.

The spelling of 165654994 in words is "one hundred sixty-five million, six hundred fifty-four thousand, nine hundred ninety-four".