667877812 has 24 divisors (see below), whose sum is σ = 1338019200. Its totient is φ = 285748320.

The previous prime is 667877809. The next prime is 667877869. The reversal of 667877812 is 218778766.

667877812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 667877812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3139 + ... + 36682.

It is an arithmetic number, because the mean of its divisors is an integer number (55750800).

Almost surely, 2^667877812 is an apocalyptic number.

It is an amenable number.

667877812 is an abundant number, since it is smaller than the sum of its proper divisors (670141388).

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

667877812 is a wasteful number, since it uses less digits than its factorization.

667877812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40431 (or 40429 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 52.

The square root of 667877812 is about 25843.3320607077. The cubic root of 667877812 is about 874.1091611529.

The spelling of 667877812 in words is "six hundred sixty-seven million, eight hundred seventy-seven thousand, eight hundred twelve".