7664660 has 24 divisors (see below), whose sum is σ = 16152360. Its totient is φ = 3055104.

The previous prime is 7664653. The next prime is 7664669. The reversal of 7664660 is 664667.

It can be written as a sum of positive squares in 4 ways, for example, as 620944 + 7043716 = 788^2 + 2654^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7664660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7664669) by changing a digit.

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, 7712 + ... + 8648.

It is an arithmetic number, because the mean of its divisors is an integer number (673015).

Almost surely, 2^7664660 is an apocalyptic number.

It is an amenable number.

7664660 is an abundant number, since it is smaller than the sum of its proper divisors (8487700).

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

7664660 is a wasteful number, since it uses less digits than its factorization.

7664660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355 (or 1353 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 7664660 is about 2768.5122358408. The cubic root of 7664660 is about 197.1655183440.

The spelling of 7664660 in words is "seven million, six hundred sixty-four thousand, six hundred sixty".