667392320 has 112 divisors (see below), whose sum is σ = 1823240448. Its totient is φ = 227942400.

The previous prime is 667392317. The next prime is 667392329. The reversal of 667392320 is 23293766.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667392329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 897869 + ... + 898611.

Almost surely, 2^667392320 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 667392320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911620224).

667392320 is an abundant number, since it is smaller than the sum of its proper divisors (1155848128).

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

667392320 is a wasteful number, since it uses less digits than its factorization.

667392320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 667392320 is about 25833.9373692823. The cubic root of 667392320 is about 873.8973080930.

The spelling of 667392320 in words is "six hundred sixty-seven million, three hundred ninety-two thousand, three hundred twenty".