1666244023 has 8 divisors (see below), whose sum is σ = 1705757328. Its totient is φ = 1626765504.

The previous prime is 1666244011. The next prime is 1666244029. The reversal of 1666244023 is 3204426661.

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

It is a cyclic number.

It is not a de Polignac number, because 1666244023 - 2⁵ = 1666243991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1666244023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666244029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105861 + ... + 120577.

It is an arithmetic number, because the mean of its divisors is an integer number (213219666).

Almost surely, 2^1666244023 is an apocalyptic number.

1666244023 is a deficient number, since it is larger than the sum of its proper divisors (39513305).

1666244023 is a wasteful number, since it uses less digits than its factorization.

1666244023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17393.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 1666244023 is about 40819.6524115529. The cubic root of 1666244023 is about 1185.5308731288.

The spelling of 1666244023 in words is "one billion, six hundred sixty-six million, two hundred forty-four thousand, twenty-three".