766668716671 has 32 divisors (see below), whose sum is σ = 932362905600. Its totient is φ = 620771921280.

The previous prime is 766668716633. The next prime is 766668716687. The reversal of 766668716671 is 176617866667.

It is not a de Polignac number, because 766668716671 - 2²¹ = 766666619519 is a prime.

It is a super-2 number, since 2×766668716671² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 766668716597 and 766668716606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (766668716171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6439360 + ... + 6557338.

It is an arithmetic number, because the mean of its divisors is an integer number (29136340800).

Almost surely, 2^766668716671 is an apocalyptic number.

766668716671 is a deficient number, since it is larger than the sum of its proper divisors (165694188929).

766668716671 is a wasteful number, since it uses less digits than its factorization.

766668716671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119599.

The product of its digits is 128024064, while the sum is 67.

The spelling of 766668716671 in words is "seven hundred sixty-six billion, six hundred sixty-eight million, seven hundred sixteen thousand, six hundred seventy-one".