2661659136 has 80 divisors (see below), whose sum is σ = 7878736800. Its totient is φ = 887215104.

The previous prime is 2661659131. The next prime is 2661659159. The reversal of 2661659136 is 6319561662.

2661659136 is a `hidden beast` number, since 26 + 6 + 1 + 6 + 591 + 36 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2661659091 and 2661659100.

It is not an unprimeable number, because it can be changed into a prime (2661659131) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 82446 + ... + 110093.

It is an arithmetic number, because the mean of its divisors is an integer number (98484210).

Almost surely, 2^2661659136 is an apocalyptic number.

It is an amenable number.

2661659136 is an abundant number, since it is smaller than the sum of its proper divisors (5217077664).

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

2661659136 is an equidigital number, since it uses as much as digits as its factorization.

2661659136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192566 (or 192544 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 2661659136 is about 51591.2699591704. The cubic root of 2661659136 is about 1385.8539978512.

The spelling of 2661659136 in words is "two billion, six hundred sixty-one million, six hundred fifty-nine thousand, one hundred thirty-six".