7686764657 has 32 divisors (see below), whose sum is σ = 9444556800. Its totient is φ = 6156025920.

The previous prime is 7686764639. The next prime is 7686764663. The reversal of 7686764657 is 7564676867.

It is not a de Polignac number, because 7686764657 - 2⁶ = 7686764593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7686764657.

It is not an unprimeable number, because it can be changed into a prime (7686764857) 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, 1599344 + ... + 1604142.

It is an arithmetic number, because the mean of its divisors is an integer number (295142400).

Almost surely, 2^7686764657 is an apocalyptic number.

It is an amenable number.

7686764657 is a deficient number, since it is larger than the sum of its proper divisors (1757792143).

7686764657 is a wasteful number, since it uses less digits than its factorization.

7686764657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5333.

The product of its digits is 71124480, while the sum is 62.

The square root of 7686764657 is about 87674.1960727328. The cubic root of 7686764657 is about 1973.5487630385.

The spelling of 7686764657 in words is "seven billion, six hundred eighty-six million, seven hundred sixty-four thousand, six hundred fifty-seven".