665162157222 has 24 divisors (see below), whose sum is σ = 1442102103000. Its totient is φ = 221579576160.

The previous prime is 665162157221. The next prime is 665162157251. The reversal of 665162157222 is 222751261566.

665162157222 is a `hidden beast` number, since 6 + 6 + 51 + 6 + 2 + 1 + 572 + 22 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665162157221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11732847 + ... + 11789402.

It is an arithmetic number, because the mean of its divisors is an integer number (60087587625).

Almost surely, 2^665162157222 is an apocalyptic number.

665162157222 is an abundant number, since it is smaller than the sum of its proper divisors (776939945778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665162157222 is a wasteful number, since it uses less digits than its factorization.

665162157222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23523828 (or 23523825 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 665162157222 in words is "six hundred sixty-five billion, one hundred sixty-two million, one hundred fifty-seven thousand, two hundred twenty-two".