664466442266 has 128 divisors (see below), whose sum is σ = 1185963171840. Its totient is φ = 275982336000.

The previous prime is 664466442259. The next prime is 664466442331. The reversal of 664466442266 is 662244664466.

It is a super-2 number, since 2×664466442266² (a number of 24 digits) contains 22 as substring.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 509950571 + ... + 509951873.

It is an arithmetic number, because the mean of its divisors is an integer number (9265337280).

It is a self-describing number.

Almost surely, 2^664466442266 is an apocalyptic number.

664466442266 is a deficient number, since it is larger than the sum of its proper divisors (521496729574).

664466442266 is a wasteful number, since it uses less digits than its factorization.

664466442266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740.

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

The spelling of 664466442266 in words is "six hundred sixty-four billion, four hundred sixty-six million, four hundred forty-two thousand, two hundred sixty-six".