7638579666 has 32 divisors (see below), whose sum is σ = 17076286080. Its totient is φ = 2530943568.

The previous prime is 7638579649. The next prime is 7638579667. The reversal of 7638579666 is 6669758367.

It is not an unprimeable number, because it can be changed into a prime (7638579667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 414501 + ... + 432536.

It is an arithmetic number, because the mean of its divisors is an integer number (533633940).

Almost surely, 2^7638579666 is an apocalyptic number.

7638579666 is an abundant number, since it is smaller than the sum of its proper divisors (9437706414).

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

7638579666 is a wasteful number, since it uses less digits than its factorization.

7638579666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847215 (or 847209 counting only the distinct ones).

The product of its digits is 68584320, while the sum is 63.

The square root of 7638579666 is about 87398.9683348722. The cubic root of 7638579666 is about 1969.4163426802.

The spelling of 7638579666 in words is "seven billion, six hundred thirty-eight million, five hundred seventy-nine thousand, six hundred sixty-six".