666652652 has 12 divisors (see below), whose sum is σ = 1185767856. Its totient is φ = 327861840.

The previous prime is 666652633. The next prime is 666652681. The reversal of 666652652 is 256256666.

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 3 ways as a sum of consecutive naturals, for example, 1365848 + ... + 1366335.

It is an arithmetic number, because the mean of its divisors is an integer number (98813988).

Almost surely, 2^666652652 is an apocalyptic number.

It is an amenable number.

666652652 is a deficient number, since it is larger than the sum of its proper divisors (519115204).

666652652 is a wasteful number, since it uses less digits than its factorization.

666652652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2732248 (or 2732246 counting only the distinct ones).

The product of its digits is 777600, while the sum is 44.

The square root of 666652652 is about 25819.6175804368. The cubic root of 666652652 is about 873.5743432239.

The spelling of 666652652 in words is "six hundred sixty-six million, six hundred fifty-two thousand, six hundred fifty-two".