766622371440 has 40 divisors (see below), whose sum is σ = 2376529352208. Its totient is φ = 204432632320.

The previous prime is 766622371393. The next prime is 766622371451. The reversal of 766622371440 is 44173226667.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 766622371440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1597129701 + ... + 1597130180.

Almost surely, 2^766622371440 is an apocalyptic number.

It is an amenable number.

766622371440 is an abundant number, since it is smaller than the sum of its proper divisors (1609906980768).

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

766622371440 is a wasteful number, since it uses less digits than its factorization.

766622371440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194259897 (or 3194259891 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 48.

The spelling of 766622371440 in words is "seven hundred sixty-six billion, six hundred twenty-two million, three hundred seventy-one thousand, four hundred forty".