66572530985785 has 16 divisors (see below), whose sum is σ = 87153780998592. Its totient is φ = 48414005121600.

The previous prime is 66572530985749. The next prime is 66572530985789. The reversal of 66572530985785 is 58758903527566.

It is not a de Polignac number, because 66572530985785 - 2⁷ = 66572530985657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66572530985789) 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, 28634199 + ... + 30871708.

It is an arithmetic number, because the mean of its divisors is an integer number (5447111312412).

Almost surely, 2^{66572530985785} is an apocalyptic number.

It is an amenable number.

66572530985785 is a deficient number, since it is larger than the sum of its proper divisors (20581250012807).

66572530985785 is a wasteful number, since it uses less digits than its factorization.

66572530985785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59526264.

The product of its (nonzero) digits is 3810240000, while the sum is 76.

The spelling of 66572530985785 in words is "sixty-six trillion, five hundred seventy-two billion, five hundred thirty million, nine hundred eighty-five thousand, seven hundred eighty-five".