665148878276 has 12 divisors (see below), whose sum is σ = 1164016518672. Its totient is φ = 332572730088.

The previous prime is 665148878257. The next prime is 665148878287. The reversal of 665148878276 is 672878841566.

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, 921491 + ... + 1476293.

It is an arithmetic number, because the mean of its divisors is an integer number (97001376556).

Almost surely, 2^665148878276 is an apocalyptic number.

It is an amenable number.

665148878276 is a deficient number, since it is larger than the sum of its proper divisors (498867640396).

665148878276 is a wasteful number, since it uses less digits than its factorization.

665148878276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854530 (or 854528 counting only the distinct ones).

The product of its digits is 216760320, while the sum is 68.

The spelling of 665148878276 in words is "six hundred sixty-five billion, one hundred forty-eight million, eight hundred seventy-eight thousand, two hundred seventy-six".