665157164407360 has 56 divisors (see below), whose sum is σ = 1583915993553600. Its totient is φ = 266061102687744.

The previous prime is 665157164407343. The next prime is 665157164407367. The reversal of 665157164407360 is 63704461751566.

It is not an unprimeable number, because it can be changed into a prime (665157164407367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42020967 + ... + 55642393.

It is an arithmetic number, because the mean of its divisors is an integer number (28284214170600).

Almost surely, 2^{665157164407360} is an apocalyptic number.

It is an amenable number.

665157164407360 is an abundant number, since it is smaller than the sum of its proper divisors (918758829146240).

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

665157164407360 is a wasteful number, since it uses less digits than its factorization.

665157164407360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13774043 (or 13774033 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 61.

The spelling of 665157164407360 in words is "six hundred sixty-five trillion, one hundred fifty-seven billion, one hundred sixty-four million, four hundred seven thousand, three hundred sixty".