669626966 has 4 divisors (see below), whose sum is σ = 1004440452. Its totient is φ = 334813482.

The previous prime is 669626941. The next prime is 669626977.

669626966 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 167406740 + ... + 167406743.

It is an arithmetic number, because the mean of its divisors is an integer number (251110113).

Almost surely, 2^669626966 is an apocalyptic number.

669626966 is a deficient number, since it is larger than the sum of its proper divisors (334813486).

669626966 is a wasteful number, since it uses less digits than its factorization.

669626966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334813485.

The product of its digits is 7558272, while the sum is 56.

The square root of 669626966 is about 25877.1514274659. The cubic root of 669626966 is about 874.8715853998.

The spelling of 669626966 in words is "six hundred sixty-nine million, six hundred twenty-six thousand, nine hundred sixty-six".