6656756898 has 32 divisors (see below), whose sum is σ = 14565499200. Its totient is φ = 2011412160.

The previous prime is 6656756879. The next prime is 6656756903. The reversal of 6656756898 is 8986576566.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121465 + ... + 167532.

It is an arithmetic number, because the mean of its divisors is an integer number (455171850).

Almost surely, 2^6656756898 is an apocalyptic number.

6656756898 is an abundant number, since it is smaller than the sum of its proper divisors (7908742302).

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

6656756898 is a wasteful number, since it uses less digits than its factorization.

6656756898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289362.

The product of its digits is 130636800, while the sum is 66.

The square root of 6656756898 is about 81588.9508328180. The cubic root of 6656756898 is about 1881.1390503795.

The spelling of 6656756898 in words is "six billion, six hundred fifty-six million, seven hundred fifty-six thousand, eight hundred ninety-eight".