66969179 has 2 divisors, whose sum is σ = 66969180. Its totient is φ = 66969178.

The previous prime is 66969151. The next prime is 66969181. The reversal of 66969179 is 97196966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66969179 - 2²⁴ = 50191963 is a prime.

Together with 66969181, it forms a pair of twin primes.

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 66969179.

It is not a weakly prime, because it can be changed into another prime (66969139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33484589 + 33484590.

It is an arithmetic number, because the mean of its divisors is an integer number (33484590).

Almost surely, 2^66969179 is an apocalyptic number.

66969179 is a deficient number, since it is larger than the sum of its proper divisors (1).

66969179 is an equidigital number, since it uses as much as digits as its factorization.

66969179 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1102248, while the sum is 53.

The square root of 66969179 is about 8183.4698630838. The cubic root of 66969179 is about 406.0925214008.

The spelling of 66969179 in words is "sixty-six million, nine hundred sixty-nine thousand, one hundred seventy-nine".