672556655 has 4 divisors (see below), whose sum is σ = 807067992. Its totient is φ = 538045320.

The previous prime is 672556613. The next prime is 672556657. The reversal of 672556655 is 556655276.

672556655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 672556655 - 2²⁸ = 404121199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672556657) 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, 67255661 + ... + 67255670.

It is an arithmetic number, because the mean of its divisors is an integer number (201766998).

Almost surely, 2^672556655 is an apocalyptic number.

672556655 is a deficient number, since it is larger than the sum of its proper divisors (134511337).

672556655 is a wasteful number, since it uses less digits than its factorization.

672556655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134511336.

The product of its digits is 1890000, while the sum is 47.

The square root of 672556655 is about 25933.6972875061. The cubic root of 672556655 is about 876.1456145244.

The spelling of 672556655 in words is "six hundred seventy-two million, five hundred fifty-six thousand, six hundred fifty-five".