646854466 has 8 divisors (see below), whose sum is σ = 970905600. Its totient is φ = 323219268.

The previous prime is 646854451. The next prime is 646854469. The reversal of 646854466 is 664458646.

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

It is not an unprimeable number, because it can be changed into a prime (646854469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100066 + ... + 106333.

It is an arithmetic number, because the mean of its divisors is an integer number (121363200).

Almost surely, 2^646854466 is an apocalyptic number.

646854466 is a deficient number, since it is larger than the sum of its proper divisors (324051134).

646854466 is a wasteful number, since it uses less digits than its factorization.

646854466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207968.

The product of its digits is 3317760, while the sum is 49.

The square root of 646854466 is about 25433.3337570992. Note that the first 3 decimals coincide. The cubic root of 646854466 is about 864.8395198293.

The spelling of 646854466 in words is "six hundred forty-six million, eight hundred fifty-four thousand, four hundred sixty-six".