646027080668 has 12 divisors (see below), whose sum is σ = 1131036610032. Its totient is φ = 322873763520.

The previous prime is 646027080667. The next prime is 646027080733. The reversal of 646027080668 is 866080720646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646027080667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34933805 + ... + 34952292.

It is an arithmetic number, because the mean of its divisors is an integer number (94253050836).

Almost surely, 2^646027080668 is an apocalyptic number.

It is an amenable number.

646027080668 is a deficient number, since it is larger than the sum of its proper divisors (485009529364).

646027080668 is a wasteful number, since it uses less digits than its factorization.

646027080668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69888412 (or 69888410 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 646027080668 in words is "six hundred forty-six billion, twenty-seven million, eighty thousand, six hundred sixty-eight".