6618681 has 12 divisors (see below), whose sum is σ = 9764352. Its totient is φ = 4318296.

The previous prime is 6618659. The next prime is 6618701. The reversal of 6618681 is 1868166.

It is not a de Polignac number, because 6618681 - 2⁶ = 6618617 is a prime.

It is a super-2 number, since 2×6618681² = 87613876359522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6618281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7401 + ... + 8246.

It is an arithmetic number, because the mean of its divisors is an integer number (813696).

Almost surely, 2^6618681 is an apocalyptic number.

It is an amenable number.

6618681 is a deficient number, since it is larger than the sum of its proper divisors (3145671).

6618681 is a wasteful number, since it uses less digits than its factorization.

6618681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15700 (or 15697 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 6618681 is about 2572.6797313307. The cubic root of 6618681 is about 187.7545555847.

The spelling of 6618681 in words is "six million, six hundred eighteen thousand, six hundred eighty-one".