2661966336 has 80 divisors (see below), whose sum is σ = 7109866368. Its totient is φ = 885043200.

The previous prime is 2661966331. The next prime is 2661966337. The reversal of 2661966336 is 6336691662.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (2661966331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660006 + ... + 664026.

Almost surely, 2^2661966336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2661966336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3554933184).

2661966336 is an abundant number, since it is smaller than the sum of its proper divisors (4447900032).

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

2661966336 is an equidigital number, since it uses as much as digits as its factorization.

2661966336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473 (or 4457 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 48.

The square root of 2661966336 is about 51594.2471211665. The cubic root of 2661966336 is about 1385.9073127134.

The spelling of 2661966336 in words is "two billion, six hundred sixty-one million, nine hundred sixty-six thousand, three hundred thirty-six".