667230138 has 24 divisors (see below), whose sum is σ = 1508521248. Its totient is φ = 212739912.

The previous prime is 667230133. The next prime is 667230149. The reversal of 667230138 is 831032766.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (667230133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 805420 + ... + 806247.

It is an arithmetic number, because the mean of its divisors is an integer number (62855052).

Almost surely, 2^667230138 is an apocalyptic number.

667230138 is an abundant number, since it is smaller than the sum of its proper divisors (841291110).

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

667230138 is a wasteful number, since it uses less digits than its factorization.

667230138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611698 (or 1611695 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 667230138 is about 25830.7982455053. The cubic root of 667230138 is about 873.8265142030.

The spelling of 667230138 in words is "six hundred sixty-seven million, two hundred thirty thousand, one hundred thirty-eight".