668006702751 has 8 divisors (see below), whose sum is σ = 890683200640. Its totient is φ = 445334003352.

The previous prime is 668006702729. The next prime is 668006702767. The reversal of 668006702751 is 157207600866.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 668006702751 - 2¹⁰ = 668006701727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 668006702751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668006702771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510235 + ... + 1263468.

It is an arithmetic number, because the mean of its divisors is an integer number (111335400080).

Almost surely, 2^668006702751 is an apocalyptic number.

668006702751 is a deficient number, since it is larger than the sum of its proper divisors (222676497889).

668006702751 is a wasteful number, since it uses less digits than its factorization.

668006702751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1899245.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 668006702751 in words is "six hundred sixty-eight billion, six million, seven hundred two thousand, seven hundred fifty-one".