7664428664 has 32 divisors (see below), whose sum is σ = 14646873600. Its totient is φ = 3759275520.

The previous prime is 7664428657. The next prime is 7664428789. The reversal of 7664428664 is 4668244667.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48044 + ... + 132804.

It is an arithmetic number, because the mean of its divisors is an integer number (457714800).

Almost surely, 2^7664428664 is an apocalyptic number.

It is an amenable number.

7664428664 is a deficient number, since it is larger than the sum of its proper divisors (6982444936).

7664428664 is a wasteful number, since it uses less digits than its factorization.

7664428664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84983 (or 84979 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 53.

The square root of 7664428664 is about 87546.7227484844. The cubic root of 7664428664 is about 1971.6353469694.

The spelling of 7664428664 in words is "seven billion, six hundred sixty-four million, four hundred twenty-eight thousand, six hundred sixty-four".