663264137 has 2 divisors, whose sum is σ = 663264138. Its totient is φ = 663264136.

The previous prime is 663264083. The next prime is 663264143. The reversal of 663264137 is 731462366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 653876041 + 9388096 = 25571^2 + 3064^2 .

It is a cyclic number.

It is not a de Polignac number, because 663264137 - 2⁶ = 663264073 is a prime.

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 663264137.

It is not a weakly prime, because it can be changed into another prime (663264167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331632068 + 331632069.

It is an arithmetic number, because the mean of its divisors is an integer number (331632069).

Almost surely, 2^663264137 is an apocalyptic number.

It is an amenable number.

663264137 is a deficient number, since it is larger than the sum of its proper divisors (1).

663264137 is an equidigital number, since it uses as much as digits as its factorization.

663264137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 38.

The square root of 663264137 is about 25753.9149839398. The cubic root of 663264137 is about 872.0917374132.

The spelling of 663264137 in words is "six hundred sixty-three million, two hundred sixty-four thousand, one hundred thirty-seven".