212066566 has 4 divisors (see below), whose sum is σ = 318099852. Its totient is φ = 106033282.

The previous prime is 212066537. The next prime is 212066587. The reversal of 212066566 is 665660212.

212066566 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53016640 + ... + 53016643.

It is an arithmetic number, because the mean of its divisors is an integer number (79524963).

Almost surely, 2^212066566 is an apocalyptic number.

212066566 is a deficient number, since it is larger than the sum of its proper divisors (106033286).

212066566 is a wasteful number, since it uses less digits than its factorization.

212066566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106033285.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 212066566 is about 14562.5054849775. The cubic root of 212066566 is about 596.3355972964.

It can be divided in two parts, 21206 and 6566, that added together give a palindrome (27772).

The spelling of 212066566 in words is "two hundred twelve million, sixty-six thousand, five hundred sixty-six".