6668013407507 has 2 divisors, whose sum is σ = 6668013407508. Its totient is φ = 6668013407506.

The previous prime is 6668013407399. The next prime is 6668013407509. The reversal of 6668013407507 is 7057043108666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6668013407507 - 2¹⁶ = 6668013341971 is a prime.

It is a super-2 number, since 2×6668013407507² (a number of 26 digits) contains 22 as substring.

Together with 6668013407509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6668013407509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334006703753 + 3334006703754.

It is an arithmetic number, because the mean of its divisors is an integer number (3334006703754).

Almost surely, 2^{6668013407507} is an apocalyptic number.

6668013407507 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668013407507 is an equidigital number, since it uses as much as digits as its factorization.

6668013407507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 53.

The spelling of 6668013407507 in words is "six trillion, six hundred sixty-eight billion, thirteen million, four hundred seven thousand, five hundred seven".