2661326920 has 64 divisors (see below), whose sum is σ = 6914033280. Its totient is φ = 903038976.

The previous prime is 2661326893. The next prime is 2661326923. The reversal of 2661326920 is 296231662.

It is a self number, because there is not a number n which added to its sum of digits gives 2661326920.

It is not an unprimeable number, because it can be changed into a prime (2661326923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21834 + ... + 76153.

It is an arithmetic number, because the mean of its divisors is an integer number (108031770).

Almost surely, 2^2661326920 is an apocalyptic number.

2661326920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2661326920 is an abundant number, since it is smaller than the sum of its proper divisors (4252706360).

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

2661326920 is a wasteful number, since it uses less digits than its factorization.

2661326920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98102 (or 98098 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 2661326920 is about 51588.0501666810. The cubic root of 2661326920 is about 1385.7963368204.

The spelling of 2661326920 in words is "two billion, six hundred sixty-one million, three hundred twenty-six thousand, nine hundred twenty".