664235263 has 2 divisors, whose sum is σ = 664235264. Its totient is φ = 664235262.

The previous prime is 664235207. The next prime is 664235267. The reversal of 664235263 is 362532466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664235263 - 2²⁹ = 127364351 is a prime.

It is a super-2 number, since 2×664235263² = 882416969225358338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664235267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332117631 + 332117632.

It is an arithmetic number, because the mean of its divisors is an integer number (332117632).

Almost surely, 2^664235263 is an apocalyptic number.

664235263 is a deficient number, since it is larger than the sum of its proper divisors (1).

664235263 is an equidigital number, since it uses as much as digits as its factorization.

664235263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 37.

The square root of 664235263 is about 25772.7620366929. The cubic root of 664235263 is about 872.5171576498.

It can be divided in two parts, 6642 and 35263, that added together give a triangular number (41905 = T₂₈₉).

The spelling of 664235263 in words is "six hundred sixty-four million, two hundred thirty-five thousand, two hundred sixty-three".