669256652966 has 16 divisors (see below), whose sum is σ = 1095324195600. Its totient is φ = 304158418080.

The previous prime is 669256652941. The next prime is 669256652971.

669256652966 is nontrivially palindromic in base 10.

669256652966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 669256652896 and 669256652905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2318141 + ... + 2590808.

It is an arithmetic number, because the mean of its divisors is an integer number (68457762225).

Almost surely, 2^669256652966 is an apocalyptic number.

669256652966 is a deficient number, since it is larger than the sum of its proper divisors (426067542634).

669256652966 is a wasteful number, since it uses less digits than its factorization.

669256652966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4915159.

The product of its digits is 377913600, while the sum is 68.

The spelling of 669256652966 in words is "six hundred sixty-nine billion, two hundred fifty-six million, six hundred fifty-two thousand, nine hundred sixty-six".