1662450665443 has 4 divisors (see below), whose sum is σ = 1665716777280. Its totient is φ = 1659184553608.

The previous prime is 1662450665437. The next prime is 1662450665471. The reversal of 1662450665443 is 3445660542661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1662450665443 - 2¹³ = 1662450657251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1662450660443) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1633055155 + ... + 1633056172.

It is an arithmetic number, because the mean of its divisors is an integer number (416429194320).

Almost surely, 2^{1662450665443} is an apocalyptic number.

1662450665443 is a deficient number, since it is larger than the sum of its proper divisors (3266111837).

1662450665443 is an equidigital number, since it uses as much as digits as its factorization.

1662450665443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266111836.

The product of its (nonzero) digits is 12441600, while the sum is 52.

The spelling of 1662450665443 in words is "one trillion, six hundred sixty-two billion, four hundred fifty million, six hundred sixty-five thousand, four hundred forty-three".