1666045033 has 8 divisors (see below), whose sum is σ = 1788894720. Its totient is φ = 1545956160.

The previous prime is 1666044977. The next prime is 1666045037. The reversal of 1666045033 is 3305406661.

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 1666045033 - 2⁹ = 1666044521 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 1666045033.

It is not an unprimeable number, because it can be changed into a prime (1666045037) 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, 688953 + ... + 691366.

It is an arithmetic number, because the mean of its divisors is an integer number (223611840).

Almost surely, 2^1666045033 is an apocalyptic number.

It is an amenable number.

1666045033 is a deficient number, since it is larger than the sum of its proper divisors (122849687).

1666045033 is a wasteful number, since it uses less digits than its factorization.

1666045033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380407.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 1666045033 is about 40817.2149098882. The cubic root of 1666045033 is about 1185.4836775246.

The spelling of 1666045033 in words is "one billion, six hundred sixty-six million, forty-five thousand, thirty-three".