6466866680 has 16 divisors (see below), whose sum is σ = 14550450120. Its totient is φ = 2586746656.

The previous prime is 6466866641. The next prime is 6466866743. The reversal of 6466866680 is 866686646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80835794 + ... + 80835873.

Almost surely, 2^6466866680 is an apocalyptic number.

It is an amenable number.

6466866680 is an abundant number, since it is smaller than the sum of its proper divisors (8083583440).

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

6466866680 is a wasteful number, since it uses less digits than its factorization.

6466866680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161671678 (or 161671674 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 56.

The square root of 6466866680 is about 80416.8308253938. The cubic root of 6466866680 is about 1863.0791369288.

The spelling of 6466866680 in words is "six billion, four hundred sixty-six million, eight hundred sixty-six thousand, six hundred eighty".