6656140080 has 120 divisors (see below), whose sum is σ = 22898846880. Its totient is φ = 1731671040.

The previous prime is 6656140079. The next prime is 6656140087. The reversal of 6656140080 is 800416566.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6656140087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83220 + ... + 142259.

It is an arithmetic number, because the mean of its divisors is an integer number (190823724).

Almost surely, 2^6656140080 is an apocalyptic number.

6656140080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6656140080 is an abundant number, since it is smaller than the sum of its proper divisors (16242706800).

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

6656140080 is a wasteful number, since it uses less digits than its factorization.

6656140080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225539 (or 225530 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 6656140080 is about 81585.1707113493. The cubic root of 6656140080 is about 1881.0809461963.

The spelling of 6656140080 in words is "six billion, six hundred fifty-six million, one hundred forty thousand, eighty".