667233391 has 8 divisors (see below), whose sum is σ = 770708304. Its totient is φ = 570894720.

The previous prime is 667233389. The next prime is 667233401. The reversal of 667233391 is 193332766.

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

It is not a de Polignac number, because 667233391 - 2¹ = 667233389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667233361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1783860 + ... + 1784233.

It is an arithmetic number, because the mean of its divisors is an integer number (96338538).

Almost surely, 2^667233391 is an apocalyptic number.

667233391 is a deficient number, since it is larger than the sum of its proper divisors (103474913).

667233391 is a wasteful number, since it uses less digits than its factorization.

667233391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568121.

The product of its digits is 122472, while the sum is 40.

The square root of 667233391 is about 25830.8612128980. The cubic root of 667233391 is about 873.8279342793.

The spelling of 667233391 in words is "six hundred sixty-seven million, two hundred thirty-three thousand, three hundred ninety-one".