7905666 has 16 divisors (see below), whose sum is σ = 15895584. Its totient is φ = 2621184.

The previous prime is 7905659. The next prime is 7905671. The reversal of 7905666 is 6665097.

It is a happy 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, 2256 + ... + 4571.

It is an arithmetic number, because the mean of its divisors is an integer number (993474).

Almost surely, 2^7905666 is an apocalyptic number.

7905666 is an abundant number, since it is smaller than the sum of its proper divisors (7989918).

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

7905666 is a wasteful number, since it uses less digits than its factorization.

7905666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 7905666 is about 2811.7016200159. The cubic root of 7905666 is about 199.2107730339.

The spelling of 7905666 in words is "seven million, nine hundred five thousand, six hundred sixty-six".