663275531 has 2 divisors, whose sum is σ = 663275532. Its totient is φ = 663275530.

The previous prime is 663275521. The next prime is 663275533. The reversal of 663275531 is 135572366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663275531 - 2⁶ = 663275467 is a prime.

It is a super-2 number, since 2×663275531² = 879868860046663922, which contains 22 as substring.

Together with 663275533, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (663275533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331637765 + 331637766.

It is an arithmetic number, because the mean of its divisors is an integer number (331637766).

Almost surely, 2^663275531 is an apocalyptic number.

663275531 is a deficient number, since it is larger than the sum of its proper divisors (1).

663275531 is an equidigital number, since it uses as much as digits as its factorization.

663275531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 38.

The square root of 663275531 is about 25754.1361920760. The cubic root of 663275531 is about 872.0967311785.

The spelling of 663275531 in words is "six hundred sixty-three million, two hundred seventy-five thousand, five hundred thirty-one".