668122338057 has 16 divisors (see below), whose sum is σ = 891869455488. Its totient is φ = 444895355520.

The previous prime is 668122338053. The next prime is 668122338197. The reversal of 668122338057 is 750833221866.

It is a happy number.

668122338057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 668122338057 - 2² = 668122338053 is a prime.

It is a super-2 number, since 2×668122338057² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (668122338053) 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, 9349332 + ... + 9420522.

It is an arithmetic number, because the mean of its divisors is an integer number (55741840968).

Almost surely, 2^668122338057 is an apocalyptic number.

It is an amenable number.

668122338057 is a deficient number, since it is larger than the sum of its proper divisors (223747117431).

668122338057 is a wasteful number, since it uses less digits than its factorization.

668122338057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74800.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 668122338057 in words is "six hundred sixty-eight billion, one hundred twenty-two million, three hundred thirty-eight thousand, fifty-seven".