64664646646 has 8 divisors (see below), whose sum is σ = 96998412960. Its totient is φ = 32331842328.

The previous prime is 64664646637. The next prime is 64664646647.

64664646646 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64664646647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38526 + ... + 361681.

It is an arithmetic number, because the mean of its divisors is an integer number (12124801620).

Almost surely, 2^64664646646 is an apocalyptic number.

64664646646 is a deficient number, since it is larger than the sum of its proper divisors (32333766314).

64664646646 is a wasteful number, since it uses less digits than its factorization.

64664646646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480998.

The product of its digits is 71663616, while the sum is 58.

The spelling of 64664646646 in words is "sixty-four billion, six hundred sixty-four million, six hundred forty-six thousand, six hundred forty-six".