664444662266 has 32 divisors (see below), whose sum is σ = 1244869627392. Its totient is φ = 258401248560.

The previous prime is 664444662199. The next prime is 664444662289. The reversal of 664444662266 is 662266444466.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3859616 + ... + 4028091.

It is an arithmetic number, because the mean of its divisors is an integer number (38902175856).

It is a self-describing number.

Almost surely, 2^664444662266 is an apocalyptic number.

664444662266 is a deficient number, since it is larger than the sum of its proper divisors (580424965126).

664444662266 is a wasteful number, since it uses less digits than its factorization.

664444662266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7888274.

The product of its digits is 47775744, while the sum is 56.

The spelling of 664444662266 in words is "six hundred sixty-four billion, four hundred forty-four million, six hundred sixty-two thousand, two hundred sixty-six".