6600681378 has 48 divisors (see below), whose sum is σ = 14697379320. Its totient is φ = 2139395328.

The previous prime is 6600681361. The next prime is 6600681379. The reversal of 6600681378 is 8731860066.

6600681378 is a `hidden beast` number, since 6 + 600 + 6 + 8 + 1 + 37 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5669638209 + 931043169 = 75297^2 + 30513^2 .

It is not an unprimeable number, because it can be changed into a prime (6600681379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1901028 + ... + 1904496.

Almost surely, 2^6600681378 is an apocalyptic number.

6600681378 is an abundant number, since it is smaller than the sum of its proper divisors (8096697942).

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

6600681378 is a wasteful number, since it uses less digits than its factorization.

6600681378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6371 (or 6368 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 6600681378 is about 81244.5775298266. The cubic root of 6600681378 is about 1875.8420043320.

The spelling of 6600681378 in words is "six billion, six hundred million, six hundred eighty-one thousand, three hundred seventy-eight".