668055367320 has 128 divisors (see below), whose sum is σ = 2207590295040. Its totient is φ = 160380426240.

The previous prime is 668055367297. The next prime is 668055367321. The reversal of 668055367320 is 23763550866.

It is a happy number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668055367321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2320849 + ... + 2592768.

It is an arithmetic number, because the mean of its divisors is an integer number (17246799180).

Almost surely, 2^668055367320 is an apocalyptic number.

668055367320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

668055367320 is an abundant number, since it is smaller than the sum of its proper divisors (1539534927720).

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

668055367320 is a wasteful number, since it uses less digits than its factorization.

668055367320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4913745 (or 4913741 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 51.

The spelling of 668055367320 in words is "six hundred sixty-eight billion, fifty-five million, three hundred sixty-seven thousand, three hundred twenty".