7764864660 has 96 divisors (see below), whose sum is σ = 27608421120. Its totient is φ = 1774825344.

The previous prime is 7764864629. The next prime is 7764864671. The reversal of 7764864660 is 664684677.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 7764864597 and 7764864606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1023319 + ... + 1030878.

It is an arithmetic number, because the mean of its divisors is an integer number (287587720).

Almost surely, 2^7764864660 is an apocalyptic number.

7764864660 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7764864660 is an abundant number, since it is smaller than the sum of its proper divisors (19843556460).

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

7764864660 is a wasteful number, since it uses less digits than its factorization.

7764864660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054222 (or 2054214 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 54.

The square root of 7764864660 is about 88118.4694601535. The cubic root of 7764864660 is about 1980.2102164317.

The spelling of 7764864660 in words is "seven billion, seven hundred sixty-four million, eight hundred sixty-four thousand, six hundred sixty".