66615000605 has 16 divisors (see below), whose sum is σ = 80632278144. Its totient is φ = 52829999040.

The previous prime is 66615000581. The next prime is 66615000689. The reversal of 66615000605 is 50600051666.

It is not a de Polignac number, because 66615000605 - 2⁶ = 66615000541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 580799 + ... + 685971.

It is an arithmetic number, because the mean of its divisors is an integer number (5039517384).

Almost surely, 2^66615000605 is an apocalyptic number.

It is an amenable number.

66615000605 is a deficient number, since it is larger than the sum of its proper divisors (14017277539).

66615000605 is a wasteful number, since it uses less digits than its factorization.

66615000605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106276.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 66615000605 in words is "sixty-six billion, six hundred fifteen million, six hundred five", and thus it is an aban number.