66567692771 has 2 divisors, whose sum is σ = 66567692772. Its totient is φ = 66567692770.

The previous prime is 66567692743. The next prime is 66567692777. The reversal of 66567692771 is 17729676566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66567692771 is a prime.

It is not a weakly prime, because it can be changed into another prime (66567692777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33283846385 + 33283846386.

It is an arithmetic number, because the mean of its divisors is an integer number (33283846386).

Almost surely, 2^66567692771 is an apocalyptic number.

66567692771 is a deficient number, since it is larger than the sum of its proper divisors (1).

66567692771 is an equidigital number, since it uses as much as digits as its factorization.

66567692771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40007520, while the sum is 62.

The spelling of 66567692771 in words is "sixty-six billion, five hundred sixty-seven million, six hundred ninety-two thousand, seven hundred seventy-one".