66630315769 has 2 divisors, whose sum is σ = 66630315770. Its totient is φ = 66630315768.

The previous prime is 66630315733. The next prime is 66630315781. The reversal of 66630315769 is 96751303666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39599010025 + 27031305744 = 198995^2 + 164412^2 .

It is a cyclic number.

It is not a de Polignac number, because 66630315769 - 2²⁵ = 66596761337 is a prime.

It is a super-2 number, since 2×66630315769² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66630315569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33315157884 + 33315157885.

It is an arithmetic number, because the mean of its divisors is an integer number (33315157885).

Almost surely, 2^66630315769 is an apocalyptic number.

It is an amenable number.

66630315769 is a deficient number, since it is larger than the sum of its proper divisors (1).

66630315769 is an equidigital number, since it uses as much as digits as its factorization.

66630315769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3674160, while the sum is 52.

The spelling of 66630315769 in words is "sixty-six billion, six hundred thirty million, three hundred fifteen thousand, seven hundred sixty-nine".