6650625891 has 96 divisors (see below), whose sum is σ = 11391098880. Its totient is φ = 3420071424.

The previous prime is 6650625859. The next prime is 6650625899. The reversal of 6650625891 is 1985260566.

It is not a de Polignac number, because 6650625891 - 2⁵ = 6650625859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6650625891.

It is not an unprimeable number, because it can be changed into a prime (6650625899) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16260495 + ... + 16260903.

It is an arithmetic number, because the mean of its divisors is an integer number (118657280).

Almost surely, 2^6650625891 is an apocalyptic number.

6650625891 is a deficient number, since it is larger than the sum of its proper divisors (4740472989).

6650625891 is a wasteful number, since it uses less digits than its factorization.

6650625891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The square root of 6650625891 is about 81551.3696451507. The cubic root of 6650625891 is about 1880.5613506844.

The spelling of 6650625891 in words is "six billion, six hundred fifty million, six hundred twenty-five thousand, eight hundred ninety-one".