66003128785 has 16 divisors (see below), whose sum is σ = 86417243712. Its totient is φ = 47994971200.

The previous prime is 66003128761. The next prime is 66003128791. The reversal of 66003128785 is 58782130066.

It is not a de Polignac number, because 66003128785 - 2⁷ = 66003128657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287595 + ... + 463375.

It is an arithmetic number, because the mean of its divisors is an integer number (5401077732).

Almost surely, 2^66003128785 is an apocalyptic number.

It is an amenable number.

66003128785 is a deficient number, since it is larger than the sum of its proper divisors (20414114927).

66003128785 is a wasteful number, since it uses less digits than its factorization.

66003128785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182624.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 66003128785 in words is "sixty-six billion, three million, one hundred twenty-eight thousand, seven hundred eighty-five".