6615847847 has 12 divisors (see below), whose sum is σ = 7714377720. Its totient is φ = 5657175216.

The previous prime is 6615847813. The next prime is 6615847853. The reversal of 6615847847 is 7487485166.

It is a happy number.

It is not a de Polignac number, because 6615847847 - 2⁶ = 6615847783 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6615847792 and 6615847801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6615841847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140588 + ... + 181649.

It is an arithmetic number, because the mean of its divisors is an integer number (642864810).

Almost surely, 2^6615847847 is an apocalyptic number.

6615847847 is a deficient number, since it is larger than the sum of its proper divisors (1098529873).

6615847847 is a wasteful number, since it uses less digits than its factorization.

6615847847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322670 (or 322663 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 56.

The square root of 6615847847 is about 81337.8623213077. The cubic root of 6615847847 is about 1877.2776206396.

The spelling of 6615847847 in words is "six billion, six hundred fifteen million, eight hundred forty-seven thousand, eight hundred forty-seven".