669707966 has 8 divisors (see below), whose sum is σ = 1007441400. Its totient is φ = 333894168.

The previous prime is 669707921. The next prime is 669707989.

It is a happy number.

669707966 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479036 + ... + 480431.

It is an arithmetic number, because the mean of its divisors is an integer number (125930175).

Almost surely, 2^669707966 is an apocalyptic number.

669707966 is a deficient number, since it is larger than the sum of its proper divisors (337733434).

669707966 is a wasteful number, since it uses less digits than its factorization.

669707966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959818.

The product of its (nonzero) digits is 5143824, while the sum is 56.

The square root of 669707966 is about 25878.7164673985. The cubic root of 669707966 is about 874.9068596369.

The spelling of 669707966 in words is "six hundred sixty-nine million, seven hundred seven thousand, nine hundred sixty-six".