6645833859 has 8 divisors (see below), whose sum is σ = 10126984960. Its totient is φ = 3797619336.

The previous prime is 6645833839. The next prime is 6645833863. The reversal of 6645833859 is 9583385466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6645833859 - 2⁹ = 6645833347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6645833799 and 6645833808.

It is not an unprimeable number, because it can be changed into a prime (6645833839) 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, 158234119 + ... + 158234160.

It is an arithmetic number, because the mean of its divisors is an integer number (1265873120).

Almost surely, 2^6645833859 is an apocalyptic number.

6645833859 is a deficient number, since it is larger than the sum of its proper divisors (3481151101).

6645833859 is a wasteful number, since it uses less digits than its factorization.

6645833859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316468289.

The product of its digits is 18662400, while the sum is 57.

The square root of 6645833859 is about 81521.9839000499. The cubic root of 6645833859 is about 1880.1095698739.

The spelling of 6645833859 in words is "six billion, six hundred forty-five million, eight hundred thirty-three thousand, eight hundred fifty-nine".