672217726 has 16 divisors (see below), whose sum is σ = 1027030608. Its totient is φ = 329918400.

The previous prime is 672217703. The next prime is 672217727. The reversal of 672217726 is 627712276.

It is a super-2 number, since 2×672217726² = 903753342297222152, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672217727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19896 + ... + 41716.

It is an arithmetic number, because the mean of its divisors is an integer number (64189413).

Almost surely, 2^672217726 is an apocalyptic number.

672217726 is a deficient number, since it is larger than the sum of its proper divisors (354812882).

672217726 is a wasteful number, since it uses less digits than its factorization.

672217726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22107.

The product of its digits is 98784, while the sum is 40.

The square root of 672217726 is about 25927.1619349284. The cubic root of 672217726 is about 875.9984145075.

It can be divided in two parts, 67221 and 7726, that added together give a palindrome (74947).

The spelling of 672217726 in words is "six hundred seventy-two million, two hundred seventeen thousand, seven hundred twenty-six".