6660140 has 24 divisors (see below), whose sum is σ = 14469840. Its totient is φ = 2571968.

The previous prime is 6660119. The next prime is 6660161. The reversal of 6660140 is 410666.

It is an interprime number because it is at equal distance from previous prime (6660119) and next prime (6660161).

It is an Ulam 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, 5162 + ... + 6321.

It is an arithmetic number, because the mean of its divisors is an integer number (602910).

Almost surely, 2^6660140 is an apocalyptic number.

It is an amenable number.

6660140 is an abundant number, since it is smaller than the sum of its proper divisors (7809700).

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

6660140 is a wasteful number, since it uses less digits than its factorization.

6660140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11521 (or 11519 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 6660140 is about 2580.7247044193. The cubic root of 6660140 is about 188.1457674376.

It can be divided in two parts, 66 and 60140, that added together give a palindrome (60206).

The spelling of 6660140 in words is "six million, six hundred sixty thousand, one hundred forty".