66573085573 has 8 divisors (see below), whose sum is σ = 66851266040. Its totient is φ = 66295177920.

The previous prime is 66573085543. The next prime is 66573085613. The reversal of 66573085573 is 37558037566.

It can be written as a sum of positive squares in 4 ways, for example, as 22398714244 + 44174371329 = 149662^2 + 210177^2 .

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 66573085573 - 2¹³ = 66573077381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66573085543) 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, 428383 + ... + 562723.

It is an arithmetic number, because the mean of its divisors is an integer number (8356408255).

Almost surely, 2^66573085573 is an apocalyptic number.

It is an amenable number.

66573085573 is a deficient number, since it is larger than the sum of its proper divisors (278180467).

66573085573 is a wasteful number, since it uses less digits than its factorization.

66573085573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136407.

The product of its (nonzero) digits is 15876000, while the sum is 55.

The spelling of 66573085573 in words is "sixty-six billion, five hundred seventy-three million, eighty-five thousand, five hundred seventy-three".