668011786764 has 96 divisors (see below), whose sum is σ = 1788000485376. Its totient is φ = 190150873920.

The previous prime is 668011786759. The next prime is 668011786801. The reversal of 668011786764 is 467687110866.

It is a super-3 number, since 3×668011786764³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 668011786698 and 668011786707.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25021767 + ... + 25048449.

It is an arithmetic number, because the mean of its divisors is an integer number (18625005056).

Almost surely, 2^668011786764 is an apocalyptic number.

It is an amenable number.

668011786764 is an abundant number, since it is smaller than the sum of its proper divisors (1119988698612).

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

668011786764 is a wasteful number, since it uses less digits than its factorization.

668011786764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27795 (or 27793 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 60.

The spelling of 668011786764 in words is "six hundred sixty-eight billion, eleven million, seven hundred eighty-six thousand, seven hundred sixty-four".