667610231 has 8 divisors (see below), whose sum is σ = 691421184. Its totient is φ = 644199640.

The previous prime is 667610221. The next prime is 667610263. The reversal of 667610231 is 132016766.

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

It is a cyclic number.

It is not a de Polignac number, because 667610231 - 2²² = 663415927 is a prime.

It is a super-3 number, since 3×667610231³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667610221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96695 + ... + 103368.

It is an arithmetic number, because the mean of its divisors is an integer number (86427648).

Almost surely, 2^667610231 is an apocalyptic number.

667610231 is a deficient number, since it is larger than the sum of its proper divisors (23810953).

667610231 is a wasteful number, since it uses less digits than its factorization.

667610231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200181.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 667610231 is about 25838.1545587141. The cubic root of 667610231 is about 873.9924101333.

Adding to 667610231 its reverse (132016766), we get a palindrome (799626997).

The spelling of 667610231 in words is "six hundred sixty-seven million, six hundred ten thousand, two hundred thirty-one".