6447676766 has 16 divisors (see below), whose sum is σ = 9711458160. Its totient is φ = 3210546240.

The previous prime is 6447676723. The next prime is 6447676783. The reversal of 6447676766 is 6676767446.

It is a congruent number.

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, 655130 + ... + 664898.

It is an arithmetic number, because the mean of its divisors is an integer number (606966135).

Almost surely, 2^6447676766 is an apocalyptic number.

6447676766 is a deficient number, since it is larger than the sum of its proper divisors (3263781394).

6447676766 is a wasteful number, since it uses less digits than its factorization.

6447676766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11099.

The product of its digits is 42674688, while the sum is 59.

The square root of 6447676766 is about 80297.4268952623. The cubic root of 6447676766 is about 1861.2344645567.

The spelling of 6447676766 in words is "six billion, four hundred forty-seven million, six hundred seventy-six thousand, seven hundred sixty-six".