664696696466 has 16 divisors (see below), whose sum is σ = 1087730311680. Its totient is φ = 302122415280.

The previous prime is 664696696457. The next prime is 664696696481.

664696696466 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 664696696393 and 664696696402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65081 + ... + 1154828.

It is an arithmetic number, because the mean of its divisors is an integer number (67983144480).

Almost surely, 2^664696696466 is an apocalyptic number.

664696696466 is a deficient number, since it is larger than the sum of its proper divisors (423033615214).

664696696466 is a wasteful number, since it uses less digits than its factorization.

664696696466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244689.

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

The spelling of 664696696466 in words is "six hundred sixty-four billion, six hundred ninety-six million, six hundred ninety-six thousand, four hundred sixty-six".