669701072 has 10 divisors (see below), whose sum is σ = 1297545858. Its totient is φ = 334850528.

The previous prime is 669701069. The next prime is 669701101. The reversal of 669701072 is 270107966.

It can be written as a sum of positive squares in only one way, i.e., 629809216 + 39891856 = 25096^2 + 6316^2 .

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, 20928143 + ... + 20928174.

Almost surely, 2^669701072 is an apocalyptic number.

It is an amenable number.

669701072 is a deficient number, since it is larger than the sum of its proper divisors (627844786).

669701072 is a wasteful number, since it uses less digits than its factorization.

669701072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41856325 (or 41856319 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 669701072 is about 25878.5832687958. The cubic root of 669701072 is about 874.9038575182.

The spelling of 669701072 in words is "six hundred sixty-nine million, seven hundred one thousand, seventy-two".