66510116983 has 2 divisors, whose sum is σ = 66510116984. Its totient is φ = 66510116982.

The previous prime is 66510116963. The next prime is 66510116993. The reversal of 66510116983 is 38961101566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66510116983 - 2⁹ = 66510116471 is a prime.

It is a super-2 number, since 2×66510116983² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66510116963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33255058491 + 33255058492.

It is an arithmetic number, because the mean of its divisors is an integer number (33255058492).

Almost surely, 2^66510116983 is an apocalyptic number.

66510116983 is a deficient number, since it is larger than the sum of its proper divisors (1).

66510116983 is an equidigital number, since it uses as much as digits as its factorization.

66510116983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 66510116983 in words is "sixty-six billion, five hundred ten million, one hundred sixteen thousand, nine hundred eighty-three".