663107725 has 24 divisors (see below), whose sum is σ = 959724288. Its totient is φ = 445022400.

The previous prime is 663107693. The next prime is 663107741. The reversal of 663107725 is 527701366.

It is not a de Polignac number, because 663107725 - 2⁵ = 663107693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32086 + ... + 48535.

It is an arithmetic number, because the mean of its divisors is an integer number (39988512).

Almost surely, 2^663107725 is an apocalyptic number.

It is an amenable number.

663107725 is a deficient number, since it is larger than the sum of its proper divisors (296616563).

663107725 is a wasteful number, since it uses less digits than its factorization.

663107725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80685 (or 80680 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 663107725 is about 25750.8781403664. The cubic root of 663107725 is about 872.0231793385.

The spelling of 663107725 in words is "six hundred sixty-three million, one hundred seven thousand, seven hundred twenty-five".