666506202 has 16 divisors (see below), whose sum is σ = 1345955520. Its totient is φ = 220011552.

The previous prime is 666506189. The next prime is 666506219. The reversal of 666506202 is 202605666.

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 in 7 ways as a sum of consecutive naturals, for example, 538627 + ... + 539862.

It is an arithmetic number, because the mean of its divisors is an integer number (84122220).

Almost surely, 2^666506202 is an apocalyptic number.

666506202 is an abundant number, since it is smaller than the sum of its proper divisors (679449318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666506202 is a wasteful number, since it uses less digits than its factorization.

666506202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078597.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 666506202 is about 25816.7814028008. The cubic root of 666506202 is about 873.5103697131.

The spelling of 666506202 in words is "six hundred sixty-six million, five hundred six thousand, two hundred two".