6647873973 has 16 divisors (see below), whose sum is σ = 9574009536. Its totient is φ = 4078851840.

The previous prime is 6647873971. The next prime is 6647874041. The reversal of 6647873973 is 3793787466.

It is not a de Polignac number, because 6647873973 - 2¹ = 6647873971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647873971) 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, 239763 + ... + 266048.

It is an arithmetic number, because the mean of its divisors is an integer number (598375596).

Almost surely, 2^6647873973 is an apocalyptic number.

It is an amenable number.

6647873973 is a deficient number, since it is larger than the sum of its proper divisors (2926135563).

6647873973 is a wasteful number, since it uses less digits than its factorization.

6647873973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506164.

The product of its digits is 32006016, while the sum is 60.

The square root of 6647873973 is about 81534.4956015551. The cubic root of 6647873973 is about 1880.3019332663.

The spelling of 6647873973 in words is "six billion, six hundred forty-seven million, eight hundred seventy-three thousand, nine hundred seventy-three".