6646994828 has 18 divisors (see below), whose sum is σ = 12019585788. Its totient is φ = 3216285960.

The previous prime is 6646994813. The next prime is 6646994831. The reversal of 6646994828 is 8284996466.

It is a Harshad number since it is a multiple of its sum of digits (62).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 860750 + ... + 868437.

It is an arithmetic number, because the mean of its divisors is an integer number (667754766).

Almost surely, 2^6646994828 is an apocalyptic number.

It is an amenable number.

6646994828 is a deficient number, since it is larger than the sum of its proper divisors (5372590960).

6646994828 is a wasteful number, since it uses less digits than its factorization.

6646994828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729253 (or 1729220 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 62.

The square root of 6646994828 is about 81529.1041775880. The cubic root of 6646994828 is about 1880.2190430609.

The spelling of 6646994828 in words is "six billion, six hundred forty-six million, nine hundred ninety-four thousand, eight hundred twenty-eight".