165412906 has 8 divisors (see below), whose sum is σ = 248213700. Its totient is φ = 82675008.

The previous prime is 165412859. The next prime is 165412909. The reversal of 165412906 is 609214561.

It can be written as a sum of positive squares in 2 ways, for example, as 141491025 + 23921881 = 11895^2 + 4891^2 .

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

It is a super-2 number, since 2×165412906² = 54722858942729672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165412909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8481 + ... + 20068.

Almost surely, 2^165412906 is an apocalyptic number.

165412906 is a deficient number, since it is larger than the sum of its proper divisors (82800794).

165412906 is a wasteful number, since it uses less digits than its factorization.

165412906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31448.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 165412906 is about 12861.2948803765. The cubic root of 165412906 is about 548.9377912111.

The spelling of 165412906 in words is "one hundred sixty-five million, four hundred twelve thousand, nine hundred six".