66511567627 has 2 divisors, whose sum is σ = 66511567628. Its totient is φ = 66511567626.

The previous prime is 66511567597. The next prime is 66511567631. The reversal of 66511567627 is 72676511566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66511567627 is a prime.

It is a super-2 number, since 2×66511567627² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66511567027) 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, 33255783813 + 33255783814.

It is an arithmetic number, because the mean of its divisors is an integer number (33255783814).

Almost surely, 2^66511567627 is an apocalyptic number.

66511567627 is a deficient number, since it is larger than the sum of its proper divisors (1).

66511567627 is an equidigital number, since it uses as much as digits as its factorization.

66511567627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3175200, while the sum is 52.

The spelling of 66511567627 in words is "sixty-six billion, five hundred eleven million, five hundred sixty-seven thousand, six hundred twenty-seven".