66650056511 has 2 divisors, whose sum is σ = 66650056512. Its totient is φ = 66650056510.

The previous prime is 66650056463. The next prime is 66650056541. The reversal of 66650056511 is 11565005666.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66650056511 - 2²⁶ = 66582947647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66650056541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33325028255 + 33325028256.

It is an arithmetic number, because the mean of its divisors is an integer number (33325028256).

Almost surely, 2^66650056511 is an apocalyptic number.

66650056511 is a deficient number, since it is larger than the sum of its proper divisors (1).

66650056511 is an equidigital number, since it uses as much as digits as its factorization.

66650056511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 66650056511 in words is "sixty-six billion, six hundred fifty million, fifty-six thousand, five hundred eleven".