66667366627 has 2 divisors, whose sum is σ = 66667366628. Its totient is φ = 66667366626.

The previous prime is 66667366609. The next prime is 66667366639. The reversal of 66667366627 is 72666376666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66667366627 - 2⁷ = 66667366499 is a prime.

It is not a weakly prime, because it can be changed into another prime (66667366127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33333683313 + 33333683314.

It is an arithmetic number, because the mean of its divisors is an integer number (33333683314).

Almost surely, 2^66667366627 is an apocalyptic number.

66667366627 is a deficient number, since it is larger than the sum of its proper divisors (1).

66667366627 is an equidigital number, since it uses as much as digits as its factorization.

66667366627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82301184, while the sum is 61.

The spelling of 66667366627 in words is "sixty-six billion, six hundred sixty-seven million, three hundred sixty-six thousand, six hundred twenty-seven".