66116570551 has 2 divisors, whose sum is σ = 66116570552. Its totient is φ = 66116570550.

The previous prime is 66116570537. The next prime is 66116570563. The reversal of 66116570551 is 15507561166.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66116570551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66116570498 and 66116570507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66116550551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33058285275 + 33058285276.

It is an arithmetic number, because the mean of its divisors is an integer number (33058285276).

Almost surely, 2^66116570551 is an apocalyptic number.

66116570551 is a deficient number, since it is larger than the sum of its proper divisors (1).

66116570551 is an equidigital number, since it uses as much as digits as its factorization.

66116570551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 66116570551 in words is "sixty-six billion, one hundred sixteen million, five hundred seventy thousand, five hundred fifty-one".