6663172 has 12 divisors (see below), whose sum is σ = 11776716. Its totient is φ = 3298400.

The previous prime is 6663121. The next prime is 6663179. The reversal of 6663172 is 2713666.

It can be written as a sum of positive squares in 2 ways, for example, as 3218436 + 3444736 = 1794^2 + 1856^2 .

It is a super-2 number, since 2×6663172² = 88795722203168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6663179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7843 + ... + 8650.

It is an arithmetic number, because the mean of its divisors is an integer number (981393).

Almost surely, 2^6663172 is an apocalyptic number.

It is an amenable number.

6663172 is a deficient number, since it is larger than the sum of its proper divisors (5113544).

6663172 is a wasteful number, since it uses less digits than its factorization.

6663172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16598 (or 16596 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The square root of 6663172 is about 2581.3120694716. The cubic root of 6663172 is about 188.1743139558.

The spelling of 6663172 in words is "six million, six hundred sixty-three thousand, one hundred seventy-two".