669424186 has 4 divisors (see below), whose sum is σ = 1004136282. Its totient is φ = 334712092.

The previous prime is 669424159. The next prime is 669424193. The reversal of 669424186 is 681424966.

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

It can be written as a sum of positive squares in only one way, i.e., 539121961 + 130302225 = 23219^2 + 11415^2 .

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, 167356045 + ... + 167356048.

Almost surely, 2^669424186 is an apocalyptic number.

669424186 is a deficient number, since it is larger than the sum of its proper divisors (334712096).

669424186 is a wasteful number, since it uses less digits than its factorization.

669424186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334712095.

The product of its digits is 497664, while the sum is 46.

The square root of 669424186 is about 25873.2330024680. The cubic root of 669424186 is about 874.7832653948.

The spelling of 669424186 in words is "six hundred sixty-nine million, four hundred twenty-four thousand, one hundred eighty-six".