6806664644 has 24 divisors (see below), whose sum is σ = 13100884608. Its totient is φ = 3074695200.

The previous prime is 6806664607. The next prime is 6806664653. The reversal of 6806664644 is 4464666086.

It is a junction number, because it is equal to n+sod(n) for n = 6806664592 and 6806664601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1390082 + ... + 1394969.

It is an arithmetic number, because the mean of its divisors is an integer number (545870192).

Almost surely, 2^6806664644 is an apocalyptic number.

It is an amenable number.

6806664644 is a deficient number, since it is larger than the sum of its proper divisors (6294219964).

6806664644 is a wasteful number, since it uses less digits than its factorization.

6806664644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2785115 (or 2785113 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 50.

The square root of 6806664644 is about 82502.5129556670. The cubic root of 6806664644 is about 1895.1552139976.

The spelling of 6806664644 in words is "six billion, eight hundred six million, six hundred sixty-four thousand, six hundred forty-four".