667309344 has 72 divisors (see below), whose sum is σ = 1896843312. Its totient is φ = 205320960.

The previous prime is 667309283. The next prime is 667309367. The reversal of 667309344 is 443903766.

It is a junction number, because it is equal to n+sod(n) for n = 667309296 and 667309305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4342 + ... + 36789.

It is an arithmetic number, because the mean of its divisors is an integer number (26345046).

Almost surely, 2^667309344 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 667309344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948421656).

667309344 is an abundant number, since it is smaller than the sum of its proper divisors (1229533968).

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

667309344 is a wasteful number, since it uses less digits than its factorization.

667309344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41170 (or 41149 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 42.

The square root of 667309344 is about 25832.3313698164. The cubic root of 667309344 is about 873.8610897617.

The spelling of 667309344 in words is "six hundred sixty-seven million, three hundred nine thousand, three hundred forty-four".