664114261 has 2 divisors, whose sum is σ = 664114262. Its totient is φ = 664114260.

The previous prime is 664114247. The next prime is 664114273. The reversal of 664114261 is 162411466.

664114261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664041361 + 72900 = 25769^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 664114261 - 2¹¹ = 664112213 is a prime.

It is a super-2 number, since 2×664114261² = 882095503327152242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664114861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332057130 + 332057131.

It is an arithmetic number, because the mean of its divisors is an integer number (332057131).

Almost surely, 2^664114261 is an apocalyptic number.

It is an amenable number.

664114261 is a deficient number, since it is larger than the sum of its proper divisors (1).

664114261 is an equidigital number, since it uses as much as digits as its factorization.

664114261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 664114261 is about 25770.4144514596. The cubic root of 664114261 is about 872.4641730430.

It can be divided in two parts, 6641 and 14261, that added together give a palindrome (20902).

The spelling of 664114261 in words is "six hundred sixty-four million, one hundred fourteen thousand, two hundred sixty-one".