663571703 has 2 divisors, whose sum is σ = 663571704. Its totient is φ = 663571702.

The previous prime is 663571663. The next prime is 663571739. The reversal of 663571703 is 307175366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663571703 - 2¹² = 663567607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663571763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331785851 + 331785852.

It is an arithmetic number, because the mean of its divisors is an integer number (331785852).

Almost surely, 2^663571703 is an apocalyptic number.

663571703 is a deficient number, since it is larger than the sum of its proper divisors (1).

663571703 is an equidigital number, since it uses as much as digits as its factorization.

663571703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 38.

The square root of 663571703 is about 25759.8855393420. The cubic root of 663571703 is about 872.2265174618.

The spelling of 663571703 in words is "six hundred sixty-three million, five hundred seventy-one thousand, seven hundred three".