663707371 has 2 divisors, whose sum is σ = 663707372. Its totient is φ = 663707370.

The previous prime is 663707357. The next prime is 663707377. The reversal of 663707371 is 173707366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663707371 - 2⁵ = 663707339 is a prime.

It is not a weakly prime, because it can be changed into another prime (663707377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331853685 + 331853686.

It is an arithmetic number, because the mean of its divisors is an integer number (331853686).

Almost surely, 2^663707371 is an apocalyptic number.

663707371 is a deficient number, since it is larger than the sum of its proper divisors (1).

663707371 is an equidigital number, since it uses as much as digits as its factorization.

663707371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 40.

The square root of 663707371 is about 25762.5187239136. The cubic root of 663707371 is about 872.2859559837.

The spelling of 663707371 in words is "six hundred sixty-three million, seven hundred seven thousand, three hundred seventy-one".