2801620866 has 16 divisors (see below), whose sum is σ = 6112627488. Its totient is φ = 848976000.

The previous prime is 2801620849. The next prime is 2801620867. The reversal of 2801620866 is 6680261082.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2801620867) 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, 21224335 + ... + 21224466.

It is an arithmetic number, because the mean of its divisors is an integer number (382039218).

Almost surely, 2^2801620866 is an apocalyptic number.

2801620866 is an abundant number, since it is smaller than the sum of its proper divisors (3311006622).

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

2801620866 is a wasteful number, since it uses less digits than its factorization.

2801620866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42448817.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 2801620866 is about 52930.3397495236. The cubic root of 2801620866 is about 1409.7316636388.

The spelling of 2801620866 in words is "two billion, eight hundred one million, six hundred twenty thousand, eight hundred sixty-six".