669886964 has 6 divisors (see below), whose sum is σ = 1172302194. Its totient is φ = 334943480.

The previous prime is 669886963. The next prime is 669886969. The reversal of 669886964 is 469688966.

It can be written as a sum of positive squares in only one way, i.e., 486555364 + 183331600 = 22058^2 + 13540^2 .

It is a junction number, because it is equal to n+sod(n) for n = 669886897 and 669886906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669886963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83735867 + ... + 83735874.

It is an arithmetic number, because the mean of its divisors is an integer number (195383699).

Almost surely, 2^669886964 is an apocalyptic number.

It is an amenable number.

669886964 is a deficient number, since it is larger than the sum of its proper divisors (502415230).

669886964 is a wasteful number, since it uses less digits than its factorization.

669886964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167471745 (or 167471743 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 62.

The square root of 669886964 is about 25882.1746381559. The cubic root of 669886964 is about 874.9848003890.

The spelling of 669886964 in words is "six hundred sixty-nine million, eight hundred eighty-six thousand, nine hundred sixty-four".