165971338 has 16 divisors (see below), whose sum is σ = 270617760. Its totient is φ = 75884976.

The previous prime is 165971317. The next prime is 165971339. The reversal of 165971338 is 833179561.

It is a junction number, because it is equal to n+sod(n) for n = 165971294 and 165971303.

It is not an unprimeable number, because it can be changed into a prime (165971339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27048 + ... + 32611.

It is an arithmetic number, because the mean of its divisors is an integer number (16913610).

Almost surely, 2^165971338 is an apocalyptic number.

165971338 is a deficient number, since it is larger than the sum of its proper divisors (104646422).

165971338 is a wasteful number, since it uses less digits than its factorization.

165971338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59781.

The product of its digits is 136080, while the sum is 43.

The square root of 165971338 is about 12882.9863773894. The cubic root of 165971338 is about 549.5548331702.

The spelling of 165971338 in words is "one hundred sixty-five million, nine hundred seventy-one thousand, three hundred thirty-eight".