668239596884288 has 56 divisors (see below), whose sum is σ = 1557862766533920. Its totient is φ = 280380250437120.

The previous prime is 668239596884281. The next prime is 668239596884383. The reversal of 668239596884288 is 882488695932866.

It is a super-2 number, since 2×668239596884288² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 668239596884197 and 668239596884206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668239596884281) 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, 36507835958 + ... + 36507854261.

It is an arithmetic number, because the mean of its divisors is an integer number (27818977973820).

Almost surely, 2^{668239596884288} is an apocalyptic number.

It is an amenable number.

668239596884288 is an abundant number, since it is smaller than the sum of its proper divisors (889623169649632).

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

668239596884288 is a wasteful number, since it uses less digits than its factorization.

668239596884288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73015690255 (or 73015690245 counting only the distinct ones).

The product of its digits is 137594142720, while the sum is 92.

The spelling of 668239596884288 in words is "six hundred sixty-eight trillion, two hundred thirty-nine billion, five hundred ninety-six million, eight hundred eighty-four thousand, two hundred eighty-eight".