663736057 has 2 divisors, whose sum is σ = 663736058. Its totient is φ = 663736056.

The previous prime is 663736039. The next prime is 663736061. The reversal of 663736057 is 750637366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 460359936 + 203376121 = 21456^2 + 14261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663736057 is a prime.

It is not a weakly prime, because it can be changed into another prime (663736027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331868028 + 331868029.

It is an arithmetic number, because the mean of its divisors is an integer number (331868029).

Almost surely, 2^663736057 is an apocalyptic number.

It is an amenable number.

663736057 is a deficient number, since it is larger than the sum of its proper divisors (1).

663736057 is an equidigital number, since it uses as much as digits as its factorization.

663736057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 43.

The square root of 663736057 is about 25763.0754569403. The cubic root of 663736057 is about 872.2985227842.

The spelling of 663736057 in words is "six hundred sixty-three million, seven hundred thirty-six thousand, fifty-seven".