6466856894 has 8 divisors (see below), whose sum is σ = 9723437640. Its totient is φ = 3225711016.

The previous prime is 6466856881. The next prime is 6466856923. The reversal of 6466856894 is 4986586646.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 3857669 + ... + 3859344.

It is an arithmetic number, because the mean of its divisors is an integer number (1215429705).

Almost surely, 2^6466856894 is an apocalyptic number.

6466856894 is a deficient number, since it is larger than the sum of its proper divisors (3256580746).

6466856894 is a wasteful number, since it uses less digits than its factorization.

6466856894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7717434.

The product of its digits is 59719680, while the sum is 62.

The square root of 6466856894 is about 80416.7699798991. The cubic root of 6466856894 is about 1863.0781971588.

The spelling of 6466856894 in words is "six billion, four hundred sixty-six million, eight hundred fifty-six thousand, eight hundred ninety-four".