165394998 has 12 divisors (see below), whose sum is σ = 358355868. Its totient is φ = 55131660.

The previous prime is 165394961. The next prime is 165395003. The reversal of 165394998 is 899493561.

165394998 is a `hidden beast` number, since 16 + 539 + 4 + 9 + 98 = 666.

It is a Curzon number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 4594288 + ... + 4594323.

It is an arithmetic number, because the mean of its divisors is an integer number (29862989).

Almost surely, 2^165394998 is an apocalyptic number.

165394998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

165394998 is an abundant number, since it is smaller than the sum of its proper divisors (192960870).

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

165394998 is a wasteful number, since it uses less digits than its factorization.

165394998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9188619 (or 9188616 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 165394998 is about 12860.5986641369. The cubic root of 165394998 is about 548.9179807199.

The spelling of 165394998 in words is "one hundred sixty-five million, three hundred ninety-four thousand, nine hundred ninety-eight".