6611644451 has 16 divisors (see below), whose sum is σ = 6734241696. Its totient is φ = 6490423296.

The previous prime is 6611644427. The next prime is 6611644493. The reversal of 6611644451 is 1544461166.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6611644451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6611644421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8400680 + ... + 8401466.

It is an arithmetic number, because the mean of its divisors is an integer number (420890106).

Almost surely, 2^6611644451 is an apocalyptic number.

6611644451 is a deficient number, since it is larger than the sum of its proper divisors (122597245).

6611644451 is a wasteful number, since it uses less digits than its factorization.

6611644451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478.

The product of its digits is 69120, while the sum is 38.

The square root of 6611644451 is about 81312.0191054188. The cubic root of 6611644451 is about 1876.8799586825.

The spelling of 6611644451 in words is "six billion, six hundred eleven million, six hundred forty-four thousand, four hundred fifty-one".