669383966 has 4 divisors (see below), whose sum is σ = 1004075952. Its totient is φ = 334691982.

The previous prime is 669383963. The next prime is 669383987.

669383966 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 not an unprimeable number, because it can be changed into a prime (669383963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 167345990 + ... + 167345993.

It is an arithmetic number, because the mean of its divisors is an integer number (251018988).

Almost surely, 2^669383966 is an apocalyptic number.

669383966 is a deficient number, since it is larger than the sum of its proper divisors (334691986).

669383966 is a wasteful number, since it uses less digits than its factorization.

669383966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334691985.

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

The square root of 669383966 is about 25872.4557396471. The cubic root of 669383966 is about 874.7657456177.

The spelling of 669383966 in words is "six hundred sixty-nine million, three hundred eighty-three thousand, nine hundred sixty-six".