165614464631661 has 16 divisors (see below), whose sum is σ = 221382082216320. Its totient is φ = 110128335791040.

The previous prime is 165614464631657. The next prime is 165614464631663. The reversal of 165614464631661 is 166136464416561.

It is a happy number.

It is not a de Polignac number, because 165614464631661 - 2² = 165614464631657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165614464631595 and 165614464631604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165614464631663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4033426 + ... + 18641283.

It is an arithmetic number, because the mean of its divisors is an integer number (13836380138520).

Almost surely, 2^{165614464631661} is an apocalyptic number.

It is an amenable number.

165614464631661 is a deficient number, since it is larger than the sum of its proper divisors (55767617584659).

165614464631661 is a wasteful number, since it uses less digits than its factorization.

165614464631661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22680916.

The product of its digits is 44789760, while the sum is 60.

The spelling of 165614464631661 in words is "one hundred sixty-five trillion, six hundred fourteen billion, four hundred sixty-four million, six hundred thirty-one thousand, six hundred sixty-one".