666630202 has 12 divisors (see below), whose sum is σ = 1163201850. Its totient is φ = 285698616.

The previous prime is 666630191. The next prime is 666630227. The reversal of 666630202 is 202036666.

It can be written as a sum of positive squares in only one way, i.e., 411237841 + 255392361 = 20279^2 + 15981^2 .

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 3401077 + ... + 3401272.

Almost surely, 2^666630202 is an apocalyptic number.

666630202 is a deficient number, since it is larger than the sum of its proper divisors (496571648).

666630202 is a wasteful number, since it uses less digits than its factorization.

666630202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6802365 (or 6802358 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 666630202 is about 25819.1828298264. The cubic root of 666630202 is about 873.5645370357.

Adding to 666630202 its reverse (202036666), we get a palindrome (868666868).

The spelling of 666630202 in words is "six hundred sixty-six million, six hundred thirty thousand, two hundred two".