66980759 has 2 divisors, whose sum is σ = 66980760. Its totient is φ = 66980758.

The previous prime is 66980737. The next prime is 66980773. The reversal of 66980759 is 95708966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66980759 - 2²⁰ = 65932183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66980789) 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, 33490379 + 33490380.

It is an arithmetic number, because the mean of its divisors is an integer number (33490380).

Almost surely, 2^66980759 is an apocalyptic number.

66980759 is a deficient number, since it is larger than the sum of its proper divisors (1).

66980759 is an equidigital number, since it uses as much as digits as its factorization.

66980759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 66980759 is about 8184.1773563383. The cubic root of 66980759 is about 406.1159265973.

The spelling of 66980759 in words is "sixty-six million, nine hundred eighty thousand, seven hundred fifty-nine".