7666680 has 64 divisors (see below), whose sum is σ = 26288640. Its totient is φ = 1752192.

The previous prime is 7666669. The next prime is 7666693. The reversal of 7666680 is 866667.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3724 + ... + 5403.

It is an arithmetic number, because the mean of its divisors is an integer number (410760).

Almost surely, 2^7666680 is an apocalyptic number.

7666680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7666680 is an abundant number, since it is smaller than the sum of its proper divisors (18621960).

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

7666680 is a wasteful number, since it uses less digits than its factorization.

7666680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9148 (or 9144 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 7666680 is about 2768.8770286887. The cubic root of 7666680 is about 197.1828376321.

The spelling of 7666680 in words is "seven million, six hundred sixty-six thousand, six hundred eighty".