672665889 has 32 divisors (see below), whose sum is σ = 1073940480. Its totient is φ = 366170112.

The previous prime is 672665887. The next prime is 672665893. The reversal of 672665889 is 988566276.

It is not a de Polignac number, because 672665889 - 2¹ = 672665887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (672665887) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121422 + ... + 126840.

It is an arithmetic number, because the mean of its divisors is an integer number (33560640).

Almost surely, 2^672665889 is an apocalyptic number.

672665889 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

672665889 is a deficient number, since it is larger than the sum of its proper divisors (401274591).

672665889 is a wasteful number, since it uses less digits than its factorization.

672665889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5709.

The product of its digits is 8709120, while the sum is 57.

The square root of 672665889 is about 25935.8032264281. The cubic root of 672665889 is about 876.1930453287.

The spelling of 672665889 in words is "six hundred seventy-two million, six hundred sixty-five thousand, eight hundred eighty-nine".