6646473078 has 32 divisors (see below), whose sum is σ = 15292561920. Its totient is φ = 1886414400.

The previous prime is 6646473073. The next prime is 6646473079. The reversal of 6646473078 is 8703746466.

It is a self number, because there is not a number n which added to its sum of digits gives 6646473078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646473073) 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, 517663 + ... + 530346.

It is an arithmetic number, because the mean of its divisors is an integer number (477892560).

Almost surely, 2^6646473078 is an apocalyptic number.

6646473078 is an abundant number, since it is smaller than the sum of its proper divisors (8646088842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6646473078 is a wasteful number, since it uses less digits than its factorization.

6646473078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048172.

The product of its (nonzero) digits is 4064256, while the sum is 51.

The square root of 6646473078 is about 81525.9043372105. The cubic root of 6646473078 is about 1880.1698463948.

The spelling of 6646473078 in words is "six billion, six hundred forty-six million, four hundred seventy-three thousand, seventy-eight".