672561216 has 84 divisors (see below), whose sum is σ = 2011631232. Its totient is φ = 214435584.

The previous prime is 672561187. The next prime is 672561223. The reversal of 672561216 is 612165276.

It is a happy number.

672561216 is a `hidden beast` number, since 6 + 7 + 25 + 612 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12136 + ... + 38631.

Almost surely, 2^672561216 is an apocalyptic number.

It is an amenable number.

672561216 is an abundant number, since it is smaller than the sum of its proper divisors (1339070016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

672561216 is a wasteful number, since it uses less digits than its factorization.

672561216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50808 (or 50795 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 672561216 is about 25933.7852231409. The cubic root of 672561216 is about 876.1475950719.

The spelling of 672561216 in words is "six hundred seventy-two million, five hundred sixty-one thousand, two hundred sixteen".