66004045 has 16 divisors (see below), whose sum is σ = 81518400. Its totient is φ = 51283584.

The previous prime is 66004033. The next prime is 66004049. The reversal of 66004045 is 54040066.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66004045 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66004049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23106 + ... + 25804.

It is an arithmetic number, because the mean of its divisors is an integer number (5094900).

Almost surely, 2^66004045 is an apocalyptic number.

It is an amenable number.

66004045 is a deficient number, since it is larger than the sum of its proper divisors (15514355).

66004045 is a wasteful number, since it uses less digits than its factorization.

66004045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 66004045 is about 8124.2873533621. The cubic root of 66004045 is about 404.1322578612.

The spelling of 66004045 in words is "sixty-six million, four thousand, forty-five".