6650744991 has 16 divisors (see below), whose sum is σ = 9985870848. Its totient is φ = 3900729600.

The previous prime is 6650744983. The next prime is 6650745001. The reversal of 6650744991 is 1994470566.

It is not a de Polignac number, because 6650744991 - 2³ = 6650744983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6650744911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3249586 + ... + 3251631.

It is an arithmetic number, because the mean of its divisors is an integer number (624116928).

Almost surely, 2^6650744991 is an apocalyptic number.

6650744991 is a deficient number, since it is larger than the sum of its proper divisors (3335125857).

6650744991 is a wasteful number, since it uses less digits than its factorization.

6650744991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501262.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 6650744991 is about 81552.0998564721. The cubic root of 6650744991 is about 1880.5725763707.

The spelling of 6650744991 in words is "six billion, six hundred fifty million, seven hundred forty-four thousand, nine hundred ninety-one".