672217761 has 8 divisors (see below), whose sum is σ = 902739040. Its totient is φ = 444920832.

The previous prime is 672217759. The next prime is 672217771. The reversal of 672217761 is 167712276.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 672217761 - 2¹ = 672217759 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (672217771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805600 + ... + 806433.

It is an arithmetic number, because the mean of its divisors is an integer number (112842380).

Almost surely, 2^672217761 is an apocalyptic number.

It is an amenable number.

672217761 is a deficient number, since it is larger than the sum of its proper divisors (230521279).

672217761 is a wasteful number, since it uses less digits than its factorization.

672217761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612175.

The product of its digits is 49392, while the sum is 39.

The square root of 672217761 is about 25927.1626098962. The cubic root of 672217761 is about 875.9984297109.

The spelling of 672217761 in words is "six hundred seventy-two million, two hundred seventeen thousand, seven hundred sixty-one".