440566642360666 has 8 divisors (see below), whose sum is σ = 666912807243540. Its totient is φ = 218262373279488.

The previous prime is 440566642360553. The next prime is 440566642360673. The reversal of 440566642360666 is 666063246665044.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 409250027345041 + 31316615015625 = 20229929^2 + 5596125^2 .

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

It is a super-2 number, since 2×440566642360666² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 440566642360598 and 440566642360607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010473950151 + ... + 1010473950586.

Almost surely, 2^{440566642360666} is an apocalyptic number.

440566642360666 is a deficient number, since it is larger than the sum of its proper divisors (226346164882874).

440566642360666 is a wasteful number, since it uses less digits than its factorization.

440566642360666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020947900848.

The product of its (nonzero) digits is 537477120, while the sum is 64.

The spelling of 440566642360666 in words is "four hundred forty trillion, five hundred sixty-six billion, six hundred forty-two million, three hundred sixty thousand, six hundred sixty-six".