669634436966 has 32 divisors (see below), whose sum is σ = 1200229915680. Its totient is φ = 276596185600.

The previous prime is 669634436923. The next prime is 669634436971.

669634436966 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 669634436896 and 669634436905.

It is a congruent number.

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, 30859265 + ... + 30880956.

It is an arithmetic number, because the mean of its divisors is an integer number (37507184865).

Almost surely, 2^669634436966 is an apocalyptic number.

669634436966 is a deficient number, since it is larger than the sum of its proper divisors (530595478714).

669634436966 is a wasteful number, since it uses less digits than its factorization.

669634436966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61740280.

The product of its digits is 544195584, while the sum is 68.

The spelling of 669634436966 in words is "six hundred sixty-nine billion, six hundred thirty-four million, four hundred thirty-six thousand, nine hundred sixty-six".