320206344466661 has 16 divisors (see below), whose sum is σ = 321312644804160. Its totient is φ = 319101653971200.

The previous prime is 320206344466651. The next prime is 320206344466703. The reversal of 320206344466661 is 166664443602023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320206344466661 is a prime.

It is a super-2 number, since 2×320206344466661² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320206344466651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3564973010 + ... + 3565062828.

It is an arithmetic number, because the mean of its divisors is an integer number (20082040300260).

Almost surely, 2^{320206344466661} is an apocalyptic number.

It is an amenable number.

320206344466661 is a deficient number, since it is larger than the sum of its proper divisors (1106300337499).

320206344466661 is a wasteful number, since it uses less digits than its factorization.

320206344466661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98644.

The product of its (nonzero) digits is 17915904, while the sum is 53.

The spelling of 320206344466661 in words is "three hundred twenty trillion, two hundred six billion, three hundred forty-four million, four hundred sixty-six thousand, six hundred sixty-one".