66254659 has 2 divisors, whose sum is σ = 66254660. Its totient is φ = 66254658.

The previous prime is 66254641. The next prime is 66254663. The reversal of 66254659 is 95645266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66254659 - 2¹⁵ = 66221891 is a prime.

It is not a weakly prime, because it can be changed into another prime (66254609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33127329 + 33127330.

It is an arithmetic number, because the mean of its divisors is an integer number (33127330).

Almost surely, 2^66254659 is an apocalyptic number.

66254659 is a deficient number, since it is larger than the sum of its proper divisors (1).

66254659 is an equidigital number, since it uses as much as digits as its factorization.

66254659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 43.

The square root of 66254659 is about 8139.6964931132. The cubic root of 66254659 is about 404.6431017287.

The spelling of 66254659 in words is "sixty-six million, two hundred fifty-four thousand, six hundred fifty-nine".