666167552201 has 4 divisors (see below), whose sum is σ = 666219210000. Its totient is φ = 666115894404.

The previous prime is 666167552179. The next prime is 666167552203. The reversal of 666167552201 is 102255761666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 666167552201 - 2⁶ = 666167552137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666167552203) by changing a digit.

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, 25809551 + ... + 25835348.

It is an arithmetic number, because the mean of its divisors is an integer number (166554802500).

Almost surely, 2^666167552201 is an apocalyptic number.

It is an amenable number.

666167552201 is a deficient number, since it is larger than the sum of its proper divisors (51657799).

666167552201 is a wasteful number, since it uses less digits than its factorization.

666167552201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51657798.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 666167552201 in words is "six hundred sixty-six billion, one hundred sixty-seven million, five hundred fifty-two thousand, two hundred one".