6655140 has 36 divisors (see below), whose sum is σ = 20187804. Its totient is φ = 1774656.

The previous prime is 6655133. The next prime is 6655169. The reversal of 6655140 is 415566.

It is a happy number.

6655140 is a `hidden beast` number, since 6 + 655 + 1 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1806336 + 4848804 = 1344^2 + 2202^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18307 + ... + 18666.

Almost surely, 2^6655140 is an apocalyptic number.

6655140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6655140 is an abundant number, since it is smaller than the sum of its proper divisors (13532664).

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

6655140 is a wasteful number, since it uses less digits than its factorization.

6655140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36988 (or 36983 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 6655140 is about 2579.7558023968. The cubic root of 6655140 is about 188.0986731149.

The spelling of 6655140 in words is "six million, six hundred fifty-five thousand, one hundred forty".