669677924 has 6 divisors (see below), whose sum is σ = 1171936374. Its totient is φ = 334838960.

The previous prime is 669677909. The next prime is 669677927. The reversal of 669677924 is 429776966.

It can be written as a sum of positive squares in only one way, i.e., 631014400 + 38663524 = 25120^2 + 6218^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 669677924.

It is not an unprimeable number, because it can be changed into a prime (669677927) by changing a digit.

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, 83709737 + ... + 83709744.

It is an arithmetic number, because the mean of its divisors is an integer number (195322729).

Almost surely, 2^669677924 is an apocalyptic number.

It is an amenable number.

669677924 is a deficient number, since it is larger than the sum of its proper divisors (502258450).

669677924 is a wasteful number, since it uses less digits than its factorization.

669677924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167419485 (or 167419483 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 56.

The square root of 669677924 is about 25878.1360225191. The cubic root of 669677924 is about 874.8937771461.

The spelling of 669677924 in words is "six hundred sixty-nine million, six hundred seventy-seven thousand, nine hundred twenty-four".