6618140 has 12 divisors (see below), whose sum is σ = 13898136. Its totient is φ = 2647248.

The previous prime is 6618127. The next prime is 6618169. The reversal of 6618140 is 418166.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165434 + ... + 165473.

It is an arithmetic number, because the mean of its divisors is an integer number (1158178).

Almost surely, 2^6618140 is an apocalyptic number.

It is an amenable number.

6618140 is an abundant number, since it is smaller than the sum of its proper divisors (7279996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6618140 is a wasteful number, since it uses less digits than its factorization.

6618140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330916 (or 330914 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 6618140 is about 2572.5745858964. The cubic root of 6618140 is about 187.7494398634.

Adding to 6618140 its sum of digits (26), we get a palindrome (6618166).

The spelling of 6618140 in words is "six million, six hundred eighteen thousand, one hundred forty".