665162157213 has 12 divisors (see below), whose sum is σ = 969769127808. Its totient is φ = 439297125000.

The previous prime is 665162157173. The next prime is 665162157217. The reversal of 665162157213 is 312751261566.

665162157213 is a `hidden beast` number, since 6 + 6 + 5 + 1 + 62 + 1 + 572 + 13 = 666.

665162157213 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665162157213 - 2¹⁴ = 665162140829 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 (665162157217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345358413 + ... + 345360338.

It is an arithmetic number, because the mean of its divisors is an integer number (80814093984).

Almost surely, 2^665162157213 is an apocalyptic number.

It is an amenable number.

665162157213 is a deficient number, since it is larger than the sum of its proper divisors (304606970595).

665162157213 is a wasteful number, since it uses less digits than its factorization.

665162157213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690718864 (or 690718861 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 665162157213 in words is "six hundred sixty-five billion, one hundred sixty-two million, one hundred fifty-seven thousand, two hundred thirteen".