66215113667 has 2 divisors, whose sum is σ = 66215113668. Its totient is φ = 66215113666.

The previous prime is 66215113631. The next prime is 66215113697. The reversal of 66215113667 is 76631151266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66215113667 - 2⁶ = 66215113603 is a prime.

It is not a weakly prime, because it can be changed into another prime (66215113607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33107556833 + 33107556834.

It is an arithmetic number, because the mean of its divisors is an integer number (33107556834).

Almost surely, 2^66215113667 is an apocalyptic number.

66215113667 is a deficient number, since it is larger than the sum of its proper divisors (1).

66215113667 is an equidigital number, since it uses as much as digits as its factorization.

66215113667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The spelling of 66215113667 in words is "sixty-six billion, two hundred fifteen million, one hundred thirteen thousand, six hundred sixty-seven".