663172075 has 12 divisors (see below), whose sum is σ = 832243608. Its totient is φ = 524144000.

The previous prime is 663172073. The next prime is 663172079. The reversal of 663172075 is 570271366.

It is not a de Polignac number, because 663172075 - 2¹ = 663172073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663172073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157726 + ... + 161875.

It is an arithmetic number, because the mean of its divisors is an integer number (69353634).

Almost surely, 2^663172075 is an apocalyptic number.

663172075 is a deficient number, since it is larger than the sum of its proper divisors (169071533).

663172075 is a wasteful number, since it uses less digits than its factorization.

663172075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319694 (or 319689 counting only the distinct ones).

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

The square root of 663172075 is about 25752.1275820077. The cubic root of 663172075 is about 872.0513863575.

The spelling of 663172075 in words is "six hundred sixty-three million, one hundred seventy-two thousand, seventy-five".