668055367577 has 32 divisors (see below), whose sum is σ = 754991677440. Its totient is φ = 587037890880.

The previous prime is 668055367549. The next prime is 668055367631. The reversal of 668055367577 is 775763550866.

It is a cyclic number.

It is not a de Polignac number, because 668055367577 - 2⁸ = 668055367321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (668055367547) 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, 6226052 + ... + 6332442.

It is an arithmetic number, because the mean of its divisors is an integer number (23593489920).

Almost surely, 2^668055367577 is an apocalyptic number.

It is an amenable number.

668055367577 is a deficient number, since it is larger than the sum of its proper divisors (86936309863).

668055367577 is a wasteful number, since it uses less digits than its factorization.

668055367577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106733.

The product of its (nonzero) digits is 222264000, while the sum is 65.

The spelling of 668055367577 in words is "six hundred sixty-eight billion, fifty-five million, three hundred sixty-seven thousand, five hundred seventy-seven".