66244369 has 2 divisors, whose sum is σ = 66244370. Its totient is φ = 66244368.

The previous prime is 66244337. The next prime is 66244379. The reversal of 66244369 is 96344266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61779600 + 4464769 = 7860^2 + 2113^2 .

It is a cyclic number.

It is not a de Polignac number, because 66244369 - 2⁵ = 66244337 is a prime.

It is a super-2 number, since 2×66244369² = 8776632848416322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66244379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33122184 + 33122185.

It is an arithmetic number, because the mean of its divisors is an integer number (33122185).

Almost surely, 2^66244369 is an apocalyptic number.

It is an amenable number.

66244369 is a deficient number, since it is larger than the sum of its proper divisors (1).

66244369 is an equidigital number, since it uses as much as digits as its factorization.

66244369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 40.

The square root of 66244369 is about 8139.0643811190. The cubic root of 66244369 is about 404.6221522933.

The spelling of 66244369 in words is "sixty-six million, two hundred forty-four thousand, three hundred sixty-nine".