66264269 has 2 divisors, whose sum is σ = 66264270. Its totient is φ = 66264268.

The previous prime is 66264259. The next prime is 66264271. The reversal of 66264269 is 96246266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52388644 + 13875625 = 7238^2 + 3725^2 .

It is a cyclic number.

It is not a de Polignac number, because 66264269 - 2⁸ = 66264013 is a prime.

It is a super-2 number, since 2×66264269² = 8781906692208722, which contains 22 as substring.

Together with 66264271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66264259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33132134 + 33132135.

It is an arithmetic number, because the mean of its divisors is an integer number (33132135).

Almost surely, 2^66264269 is an apocalyptic number.

It is an amenable number.

66264269 is a deficient number, since it is larger than the sum of its proper divisors (1).

66264269 is an equidigital number, since it uses as much as digits as its factorization.

66264269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 41.

The square root of 66264269 is about 8140.2867885597. The cubic root of 66264269 is about 404.6626647918.

The spelling of 66264269 in words is "sixty-six million, two hundred sixty-four thousand, two hundred sixty-nine".