66970759 has 2 divisors, whose sum is σ = 66970760. Its totient is φ = 66970758.

The previous prime is 66970699. The next prime is 66970781. The reversal of 66970759 is 95707966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66970759 - 2⁹ = 66970247 is a prime.

It is a super-2 number, since 2×66970759² = 8970165122072162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66970559) 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, 33485379 + 33485380.

It is an arithmetic number, because the mean of its divisors is an integer number (33485380).

Almost surely, 2^66970759 is an apocalyptic number.

66970759 is a deficient number, since it is larger than the sum of its proper divisors (1).

66970759 is an equidigital number, since it uses as much as digits as its factorization.

66970759 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 714420, while the sum is 49.

The square root of 66970759 is about 8183.5663985820. The cubic root of 66970759 is about 406.0957150149.

The spelling of 66970759 in words is "sixty-six million, nine hundred seventy thousand, seven hundred fifty-nine".