667859472 has 320 divisors, whose sum is σ = 2316042240. Its totient is φ = 180278784.

The previous prime is 667859461. The next prime is 667859477. The reversal of 667859472 is 274958766.

667859472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667859477) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5258673 + ... + 5258799.

It is an arithmetic number, because the mean of its divisors is an integer number (7237632).

Almost surely, 2^667859472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667859472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158021120).

667859472 is an abundant number, since it is smaller than the sum of its proper divisors (1648182768).

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

667859472 is a wasteful number, since it uses less digits than its factorization.

667859472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 223 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 667859472 is about 25842.9772278660. The cubic root of 667859472 is about 874.1011600343.

The spelling of 667859472 in words is "six hundred sixty-seven million, eight hundred fifty-nine thousand, four hundred seventy-two".