646105264666 has 8 divisors (see below), whose sum is σ = 981425718720. Its totient is φ = 318963358428.

The previous prime is 646105264627. The next prime is 646105264711. The reversal of 646105264666 is 666462501646.

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

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, 2044636756 + ... + 2044637071.

It is an arithmetic number, because the mean of its divisors is an integer number (122678214840).

Almost surely, 2^646105264666 is an apocalyptic number.

646105264666 is a deficient number, since it is larger than the sum of its proper divisors (335320454054).

646105264666 is a wasteful number, since it uses less digits than its factorization.

646105264666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089273908.

The product of its (nonzero) digits is 7464960, while the sum is 52.

The spelling of 646105264666 in words is "six hundred forty-six billion, one hundred five million, two hundred sixty-four thousand, six hundred sixty-six".