663377657 has 2 divisors, whose sum is σ = 663377658. Its totient is φ = 663377656.

The previous prime is 663377633. The next prime is 663377677. The reversal of 663377657 is 756773366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 433430761 + 229946896 = 20819^2 + 15164^2 .

It is a cyclic number.

It is not a de Polignac number, because 663377657 - 2⁶ = 663377593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (663377677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331688828 + 331688829.

It is an arithmetic number, because the mean of its divisors is an integer number (331688829).

Almost surely, 2^663377657 is an apocalyptic number.

It is an amenable number.

663377657 is a deficient number, since it is larger than the sum of its proper divisors (1).

663377657 is an equidigital number, since it uses as much as digits as its factorization.

663377657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3333960, while the sum is 50.

The square root of 663377657 is about 25756.1188264071. The cubic root of 663377657 is about 872.1414884355.

The spelling of 663377657 in words is "six hundred sixty-three million, three hundred seventy-seven thousand, six hundred fifty-seven".