6647909892 has 24 divisors (see below), whose sum is σ = 16705004736. Its totient is φ = 2045510688.

The previous prime is 6647909887. The next prime is 6647909899. The reversal of 6647909892 is 2989097466.

It is not an unprimeable number, because it can be changed into a prime (6647909899) 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, 21307248 + ... + 21307559.

It is an arithmetic number, because the mean of its divisors is an integer number (696041864).

Almost surely, 2^6647909892 is an apocalyptic number.

It is an amenable number.

6647909892 is an abundant number, since it is smaller than the sum of its proper divisors (10057094844).

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

6647909892 is a wasteful number, since it uses less digits than its factorization.

6647909892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42614827 (or 42614825 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 60.

The square root of 6647909892 is about 81534.7158699900. The cubic root of 6647909892 is about 1880.3053197346.

The spelling of 6647909892 in words is "six billion, six hundred forty-seven million, nine hundred nine thousand, eight hundred ninety-two".