765563666680 has 32 divisors (see below), whose sum is σ = 1723380120000. Its totient is φ = 306072245376.

The previous prime is 765563666663. The next prime is 765563666719. The reversal of 765563666680 is 86666365567.

It is a super-2 number, since 2×765563666680² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4707207 + ... + 4867126.

It is an arithmetic number, because the mean of its divisors is an integer number (53855628750).

Almost surely, 2^765563666680 is an apocalyptic number.

It is an amenable number.

765563666680 is an abundant number, since it is smaller than the sum of its proper divisors (957816453320).

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

765563666680 is a wasteful number, since it uses less digits than its factorization.

765563666680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9576343 (or 9576339 counting only the distinct ones).

The product of its (nonzero) digits is 195955200, while the sum is 64.

The spelling of 765563666680 in words is "seven hundred sixty-five billion, five hundred sixty-three million, six hundred sixty-six thousand, six hundred eighty".