165686038 has 8 divisors (see below), whose sum is σ = 284033232. Its totient is φ = 71008296.

The previous prime is 165686021. The next prime is 165686047. The reversal of 165686038 is 830686561.

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

It is a super-4 number, since 4×165686038⁴ (a number of 34 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165685985 and 165686003.

It is a congruent number.

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, 5917345 + ... + 5917372.

It is an arithmetic number, because the mean of its divisors is an integer number (35504154).

Almost surely, 2^165686038 is an apocalyptic number.

165686038 is a deficient number, since it is larger than the sum of its proper divisors (118347194).

165686038 is a wasteful number, since it uses less digits than its factorization.

165686038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11834726.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 165686038 is about 12871.9088716476. The cubic root of 165686038 is about 549.2397628701.

The spelling of 165686038 in words is "one hundred sixty-five million, six hundred eighty-six thousand, thirty-eight".