6664690964666 has 64 divisors (see below), whose sum is σ = 11586218434560. Its totient is φ = 2816183557440.

The previous prime is 6664690964639. The next prime is 6664690964753.

6664690964666 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 6664690964593 and 6664690964602.

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 31 ways as a sum of consecutive naturals, for example, 1449789080 + ... + 1449793676.

It is an arithmetic number, because the mean of its divisors is an integer number (181034663040).

Almost surely, 2^{6664690964666} is an apocalyptic number.

6664690964666 is a deficient number, since it is larger than the sum of its proper divisors (4921527469894).

6664690964666 is a wasteful number, since it uses less digits than its factorization.

6664690964666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6939.

The product of its (nonzero) digits is 2176782336, while the sum is 74.

The spelling of 6664690964666 in words is "six trillion, six hundred sixty-four billion, six hundred ninety million, nine hundred sixty-four thousand, six hundred sixty-six".