444206664665321 has 2 divisors, whose sum is σ = 444206664665322. Its totient is φ = 444206664665320.

The previous prime is 444206664665273. The next prime is 444206664665347. The reversal of 444206664665321 is 123566466602444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 339961319041600 + 104245345623721 = 18438040^2 + 10210061^2 .

It is a cyclic number.

It is not a de Polignac number, because 444206664665321 - 2²² = 444206660471017 is a prime.

It is a super-3 number, since 3×444206664665321³ (a number of 45 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (444206664665821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222103332332660 + 222103332332661.

It is an arithmetic number, because the mean of its divisors is an integer number (222103332332661).

Almost surely, 2^{444206664665321} is an apocalyptic number.

It is an amenable number.

444206664665321 is a deficient number, since it is larger than the sum of its proper divisors (1).

444206664665321 is an equidigital number, since it uses as much as digits as its factorization.

444206664665321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119439360, while the sum is 59.

The spelling of 444206664665321 in words is "four hundred forty-four trillion, two hundred six billion, six hundred sixty-four million, six hundred sixty-five thousand, three hundred twenty-one".