667999238 has 8 divisors (see below), whose sum is σ = 1025301288. Its totient is φ = 326232144.

The previous prime is 667999231. The next prime is 667999243. The reversal of 667999238 is 832999766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667999231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3883631 + ... + 3883802.

It is an arithmetic number, because the mean of its divisors is an integer number (128162661).

Almost surely, 2^667999238 is an apocalyptic number.

667999238 is a deficient number, since it is larger than the sum of its proper divisors (357302050).

667999238 is a wasteful number, since it uses less digits than its factorization.

667999238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7767478.

The product of its digits is 8817984, while the sum is 59.

The square root of 667999238 is about 25845.6812253034. The cubic root of 667999238 is about 874.1621314944.

The spelling of 667999238 in words is "six hundred sixty-seven million, nine hundred ninety-nine thousand, two hundred thirty-eight".