665013723165642 has 8 divisors (see below), whose sum is σ = 1330027446331296. Its totient is φ = 221671241055212.

The previous prime is 665013723165523. The next prime is 665013723165661. The reversal of 665013723165642 is 246561327310566.

It is a sphenic number, since it is the product of 3 distinct primes.

665013723165642 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55417810263798 + ... + 55417810263809.

It is an arithmetic number, because the mean of its divisors is an integer number (166253430791412).

Almost surely, 2^{665013723165642} is an apocalyptic number.

665013723165642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

665013723165642 is a wasteful number, since it uses less digits than its factorization.

665013723165642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110835620527612.

The product of its (nonzero) digits is 32659200, while the sum is 57.

The spelling of 665013723165642 in words is "six hundred sixty-five trillion, thirteen billion, seven hundred twenty-three million, one hundred sixty-five thousand, six hundred forty-two".