668076311381 has 8 divisors (see below), whose sum is σ = 698578490880. Its totient is φ = 637695413872.

The previous prime is 668076311369. The next prime is 668076311387. The reversal of 668076311381 is 183113670866.

668076311381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 668076311381 - 2²⁶ = 668009202517 is a prime.

It is a super-2 number, since 2×668076311381² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668076311387) 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, 30309230 + ... + 30331263.

It is an arithmetic number, because the mean of its divisors is an integer number (87322311360).

Almost surely, 2^668076311381 is an apocalyptic number.

It is an amenable number.

668076311381 is a deficient number, since it is larger than the sum of its proper divisors (30502179499).

668076311381 is a wasteful number, since it uses less digits than its factorization.

668076311381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60640995.

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 668076311381 in words is "six hundred sixty-eight billion, seventy-six million, three hundred eleven thousand, three hundred eighty-one".