663172 has 12 divisors (see below), whose sum is σ = 1200780. Its totient is φ = 320096.

The previous prime is 663167. The next prime is 663191. The reversal of 663172 is 271366.

It can be written as a sum of positive squares in 2 ways, for example, as 367236 + 295936 = 606^2 + 544^2 .

It is an unprimeable number.

663172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2743 + ... + 2974.

It is an arithmetic number, because the mean of its divisors is an integer number (100065).

2⁶⁶³¹⁷² is an apocalyptic number.

It is an amenable number.

663172 is a deficient number, since it is larger than the sum of its proper divisors (537608).

663172 is a wasteful number, since it uses less digits than its factorization.

663172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750 (or 5748 counting only the distinct ones).

The product of its digits is 1512, while the sum is 25.

The square root of 663172 is about 814.3537314951. The cubic root of 663172 is about 87.2051353483.

The spelling of 663172 in words is "six hundred sixty-three thousand, one hundred seventy-two".