669635228 has 6 divisors (see below), whose sum is σ = 1171861656. Its totient is φ = 334817612.

The previous prime is 669635209. The next prime is 669635233. The reversal of 669635228 is 822536966.

It is a super-2 number, since 2×669635228² = 896822677157223968, which contains 22 as substring.

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, 83704400 + ... + 83704407.

It is an arithmetic number, because the mean of its divisors is an integer number (195310276).

Almost surely, 2^669635228 is an apocalyptic number.

It is an amenable number.

669635228 is a deficient number, since it is larger than the sum of its proper divisors (502226428).

669635228 is a wasteful number, since it uses less digits than its factorization.

669635228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167408811 (or 167408809 counting only the distinct ones).

The product of its digits is 933120, while the sum is 47.

The square root of 669635228 is about 25877.3110658739. The cubic root of 669635228 is about 874.8751835022.

The spelling of 669635228 in words is "six hundred sixty-nine million, six hundred thirty-five thousand, two hundred twenty-eight".