668531052801 has 16 divisors (see below), whose sum is σ = 990724372800. Its totient is φ = 445548769344.

The previous prime is 668531052781. The next prime is 668531052851. The reversal of 668531052801 is 108250135866.

668531052801 is a `hidden beast` number, since 6 + 68 + 53 + 10 + 528 + 0 + 1 = 666.

It is not a de Polignac number, because 668531052801 - 2¹⁴ = 668531036417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668531052851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3761511 + ... + 3935228.

It is an arithmetic number, because the mean of its divisors is an integer number (61920273300).

Almost surely, 2^668531052801 is an apocalyptic number.

It is an amenable number.

668531052801 is a deficient number, since it is larger than the sum of its proper divisors (322193319999).

668531052801 is a wasteful number, since it uses less digits than its factorization.

668531052801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7699965 (or 7699959 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 668531052801 in words is "six hundred sixty-eight billion, five hundred thirty-one million, fifty-two thousand, eight hundred one".