66975659 has 2 divisors, whose sum is σ = 66975660. Its totient is φ = 66975658.

The previous prime is 66975637. The next prime is 66975677. The reversal of 66975659 is 95657966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66975659 - 2²⁰ = 65927083 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66975659.

It is not a weakly prime, because it can be changed into another prime (66975619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33487829 + 33487830.

It is an arithmetic number, because the mean of its divisors is an integer number (33487830).

Almost surely, 2^66975659 is an apocalyptic number.

66975659 is a deficient number, since it is larger than the sum of its proper divisors (1).

66975659 is an equidigital number, since it uses as much as digits as its factorization.

66975659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3061800, while the sum is 53.

The square root of 66975659 is about 8183.8657735816. The cubic root of 66975659 is about 406.1056189416.

The spelling of 66975659 in words is "sixty-six million, nine hundred seventy-five thousand, six hundred fifty-nine".