165439970 has 16 divisors (see below), whose sum is σ = 298097280. Its totient is φ = 66108144.

The previous prime is 165439933. The next prime is 165440027. The reversal of 165439970 is 79934561.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2429 + ... + 18351.

It is an arithmetic number, because the mean of its divisors is an integer number (18631080).

Almost surely, 2^165439970 is an apocalyptic number.

165439970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165439970 is a deficient number, since it is larger than the sum of its proper divisors (132657310).

165439970 is a wasteful number, since it uses less digits than its factorization.

165439970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16969.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 165439970 is about 12862.3469864562. The cubic root of 165439970 is about 548.9677276946.

The spelling of 165439970 in words is "one hundred sixty-five million, four hundred thirty-nine thousand, nine hundred seventy".