668055020207 has 4 divisors (see below), whose sum is σ = 668353661256. Its totient is φ = 667756379160.

The previous prime is 668055020179. The next prime is 668055020221. The reversal of 668055020207 is 702020550866.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702020550866 = 2 ⋅351010275433.

It is a cyclic number.

It is not a de Polignac number, because 668055020207 - 2²⁶ = 667987911343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668055020267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149317169 + ... + 149321642.

It is an arithmetic number, because the mean of its divisors is an integer number (167088415314).

Almost surely, 2^668055020207 is an apocalyptic number.

668055020207 is a deficient number, since it is larger than the sum of its proper divisors (298641049).

668055020207 is a wasteful number, since it uses less digits than its factorization.

668055020207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298641048.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 668055020207 in words is "six hundred sixty-eight billion, fifty-five million, twenty thousand, two hundred seven".