7664690964666 has 32 divisors (see below), whose sum is σ = 16286997058560. Its totient is φ = 2397807892656.

The previous prime is 7664690964617. The next prime is 7664690964719. The reversal of 7664690964666 is 6664690964667.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314165986 + ... + 314190381.

It is an arithmetic number, because the mean of its divisors is an integer number (508968658080).

Almost surely, 2^{7664690964666} is an apocalyptic number.

7664690964666 is an abundant number, since it is smaller than the sum of its proper divisors (8622306093894).

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

7664690964666 is a wasteful number, since it uses less digits than its factorization.

7664690964666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628356498.

The product of its (nonzero) digits is 2539579392, while the sum is 75.

Subtracting from 7664690964666 its reverse (6664690964667), we obtain a palindrome (999999999999).

The spelling of 7664690964666 in words is "seven trillion, six hundred sixty-four billion, six hundred ninety million, nine hundred sixty-four thousand, six hundred sixty-six".