212066585809 has 8 divisors (see below), whose sum is σ = 228569574632. Its totient is φ = 195590764800.

The previous prime is 212066585789. The next prime is 212066585821. The reversal of 212066585809 is 908585660212.

It can be written as a sum of positive squares in 4 ways, for example, as 35183255184 + 176883330625 = 187572^2 + 420575^2 .

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 212066585809 - 2⁵ = 212066585777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212066585209) 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, 6775734 + ... + 6806959.

It is an arithmetic number, because the mean of its divisors is an integer number (28571196829).

Almost surely, 2^212066585809 is an apocalyptic number.

It is an amenable number.

212066585809 is a deficient number, since it is larger than the sum of its proper divisors (16502988823).

212066585809 is a wasteful number, since it uses less digits than its factorization.

212066585809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13583907.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 212066585809 in words is "two hundred twelve billion, sixty-six million, five hundred eighty-five thousand, eight hundred nine".