66062706691 has 2 divisors, whose sum is σ = 66062706692. Its totient is φ = 66062706690.

The previous prime is 66062706679. The next prime is 66062706727. The reversal of 66062706691 is 19660726066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66062706691 - 2²⁷ = 65928488963 is a prime.

It is not a weakly prime, because it can be changed into another prime (66062706601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33031353345 + 33031353346.

It is an arithmetic number, because the mean of its divisors is an integer number (33031353346).

Almost surely, 2^66062706691 is an apocalyptic number.

66062706691 is a deficient number, since it is larger than the sum of its proper divisors (1).

66062706691 is an equidigital number, since it uses as much as digits as its factorization.

66062706691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 66062706691 in words is "sixty-six billion, sixty-two million, seven hundred six thousand, six hundred ninety-one".