766666720788 has 48 divisors (see below), whose sum is σ = 1814215729536. Its totient is φ = 251937992320.

The previous prime is 766666720753. The next prime is 766666720793. The reversal of 766666720788 is 887027666667.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16994470 + ... + 17039522.

It is an arithmetic number, because the mean of its divisors is an integer number (37796161032).

Almost surely, 2^766666720788 is an apocalyptic number.

It is an amenable number.

766666720788 is an abundant number, since it is smaller than the sum of its proper divisors (1047549008748).

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

766666720788 is a wasteful number, since it uses less digits than its factorization.

766666720788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65104 (or 65102 counting only the distinct ones).

The product of its (nonzero) digits is 341397504, while the sum is 69.

The spelling of 766666720788 in words is "seven hundred sixty-six billion, six hundred sixty-six million, seven hundred twenty thousand, seven hundred eighty-eight".