165556413 has 32 divisors (see below), whose sum is σ = 269988480. Its totient is φ = 99429120.

The previous prime is 165556411. The next prime is 165556439. The reversal of 165556413 is 314655561.

165556413 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 5 + 641 + 3 = 666.

It is not a de Polignac number, because 165556413 - 2¹ = 165556411 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165556411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31095 + ... + 36027.

It is an arithmetic number, because the mean of its divisors is an integer number (8437140).

Almost surely, 2^165556413 is an apocalyptic number.

It is an amenable number.

165556413 is a deficient number, since it is larger than the sum of its proper divisors (104432067).

165556413 is a wasteful number, since it uses less digits than its factorization.

165556413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066 (or 5060 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 165556413 is about 12866.8726969688. The cubic root of 165556413 is about 549.0964923411.

The spelling of 165556413 in words is "one hundred sixty-five million, five hundred fifty-six thousand, four hundred thirteen".