6666140 has 24 divisors (see below), whose sum is σ = 15076320. Its totient is φ = 2461248.

The previous prime is 6666137. The next prime is 6666157. The reversal of 6666140 is 416666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12560 + ... + 13079.

It is an arithmetic number, because the mean of its divisors is an integer number (628180).

Almost surely, 2^6666140 is an apocalyptic number.

It is an amenable number.

6666140 is an abundant number, since it is smaller than the sum of its proper divisors (8410180).

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

6666140 is a wasteful number, since it uses less digits than its factorization.

6666140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25661 (or 25659 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6666140 is about 2581.8869068958. The cubic root of 6666140 is about 188.2022495226.

The spelling of 6666140 in words is "six million, six hundred sixty-six thousand, one hundred forty".