6681610231 has 2 divisors, whose sum is σ = 6681610232. Its totient is φ = 6681610230.

The previous prime is 6681610219. The next prime is 6681610259. The reversal of 6681610231 is 1320161866.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6681610231 - 2⁹ = 6681609719 is a prime.

It is a super-2 number, since 2×6681610231² = 89287830558007746722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6681610261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3340805115 + 3340805116.

It is an arithmetic number, because the mean of its divisors is an integer number (3340805116).

Almost surely, 2^6681610231 is an apocalyptic number.

6681610231 is a deficient number, since it is larger than the sum of its proper divisors (1).

6681610231 is an equidigital number, since it uses as much as digits as its factorization.

6681610231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 6681610231 is about 81741.1171381943. The cubic root of 6681610231 is about 1883.4772515980.

The spelling of 6681610231 in words is "six billion, six hundred eighty-one million, six hundred ten thousand, two hundred thirty-one".