766663138572 has 48 divisors (see below), whose sum is σ = 1823458465920. Its totient is φ = 250658995968.

The previous prime is 766663138567. The next prime is 766663138573. The reversal of 766663138572 is 275831366667.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (766663138573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2630413 + ... + 2907300.

It is an arithmetic number, because the mean of its divisors is an integer number (37988718040).

Almost surely, 2^766663138572 is an apocalyptic number.

It is an amenable number.

766663138572 is an abundant number, since it is smaller than the sum of its proper divisors (1056795327348).

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

766663138572 is a wasteful number, since it uses less digits than its factorization.

766663138572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5537942 (or 5537940 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 60.

The spelling of 766663138572 in words is "seven hundred sixty-six billion, six hundred sixty-three million, one hundred thirty-eight thousand, five hundred seventy-two".