667381938 has 16 divisors (see below), whose sum is σ = 1392797376. Its totient is φ = 212788400.

The previous prime is 667381921. The next prime is 667381963. The reversal of 667381938 is 839183766.

It is a Curzon 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, 2417913 + ... + 2418188.

It is an arithmetic number, because the mean of its divisors is an integer number (87049836).

Almost surely, 2^667381938 is an apocalyptic number.

667381938 is an abundant number, since it is smaller than the sum of its proper divisors (725415438).

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

667381938 is a wasteful number, since it uses less digits than its factorization.

667381938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836129.

The product of its digits is 1306368, while the sum is 51.

The square root of 667381938 is about 25833.7364312637. The cubic root of 667381938 is about 873.8927766009.

The spelling of 667381938 in words is "six hundred sixty-seven million, three hundred eighty-one thousand, nine hundred thirty-eight".