766668716676 has 36 divisors (see below), whose sum is σ = 1939320660732. Its totient is φ = 255377885184.

The previous prime is 766668716633. The next prime is 766668716687. The reversal of 766668716676 is 676617866667.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 416962067076 + 349706649600 = 645726^2 + 591360^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×766668716676² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7379101 + ... + 7482276.

Almost surely, 2^766668716676 is an apocalyptic number.

It is an amenable number.

766668716676 is an abundant number, since it is smaller than the sum of its proper divisors (1172651944056).

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

766668716676 is a wasteful number, since it uses less digits than its factorization.

766668716676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14862820 (or 14862815 counting only the distinct ones).

The product of its digits is 768144384, while the sum is 72.

The spelling of 766668716676 in words is "seven hundred sixty-six billion, six hundred sixty-eight million, seven hundred sixteen thousand, six hundred seventy-six".