7640664 has 32 divisors (see below), whose sum is σ = 19195440. Its totient is φ = 2534400.

The previous prime is 7640621. The next prime is 7640681. The reversal of 7640664 is 4660467.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5124 + ... + 6444.

Almost surely, 2^7640664 is an apocalyptic number.

It is an amenable number.

7640664 is an abundant number, since it is smaller than the sum of its proper divisors (11554776).

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

7640664 is a wasteful number, since it uses less digits than its factorization.

7640664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1567 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 7640664 is about 2764.1751029918. The cubic root of 7640664 is about 196.9595457486.

The spelling of 7640664 in words is "seven million, six hundred forty thousand, six hundred sixty-four".