2661933880 has 16 divisors (see below), whose sum is σ = 5989351320. Its totient is φ = 1064773536.

The previous prime is 2661933787. The next prime is 2661933907. The reversal of 2661933880 is 883391662.

It is a self number, because there is not a number n which added to its sum of digits gives 2661933880.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 33274134 + ... + 33274213.

Almost surely, 2^2661933880 is an apocalyptic number.

2661933880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2661933880 is an abundant number, since it is smaller than the sum of its proper divisors (3327417440).

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

2661933880 is a wasteful number, since it uses less digits than its factorization.

2661933880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66548358 (or 66548354 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 2661933880 is about 51593.9325890167. The cubic root of 2661933880 is about 1385.9016801365.

The spelling of 2661933880 in words is "two billion, six hundred sixty-one million, nine hundred thirty-three thousand, eight hundred eighty".