66288755591 has 2 divisors, whose sum is σ = 66288755592. Its totient is φ = 66288755590.

The previous prime is 66288755521. The next prime is 66288755609. The reversal of 66288755591 is 19555788266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66288755591 - 2¹⁴ = 66288739207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66288755521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33144377795 + 33144377796.

It is an arithmetic number, because the mean of its divisors is an integer number (33144377796).

Almost surely, 2^66288755591 is an apocalyptic number.

66288755591 is a deficient number, since it is larger than the sum of its proper divisors (1).

66288755591 is an equidigital number, since it uses as much as digits as its factorization.

66288755591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288000, while the sum is 62.

The spelling of 66288755591 in words is "sixty-six billion, two hundred eighty-eight million, seven hundred fifty-five thousand, five hundred ninety-one".