6642443105 has 16 divisors (see below), whose sum is σ = 8141031360. Its totient is φ = 5201731008.

The previous prime is 6642443081. The next prime is 6642443113. The reversal of 6642443105 is 5013442466.

It is a cyclic number.

It is not a de Polignac number, because 6642443105 - 2²² = 6638248801 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28187 + ... + 118656.

It is an arithmetic number, because the mean of its divisors is an integer number (508814460).

Almost surely, 2^6642443105 is an apocalyptic number.

It is an amenable number.

6642443105 is a deficient number, since it is larger than the sum of its proper divisors (1498588255).

6642443105 is a wasteful number, since it uses less digits than its factorization.

6642443105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147040.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 6642443105 is about 81501.1846846412. The cubic root of 6642443105 is about 1879.7897668376.

The spelling of 6642443105 in words is "six billion, six hundred forty-two million, four hundred forty-three thousand, one hundred five".