66205436 has 12 divisors (see below), whose sum is σ = 126392280. Its totient is φ = 30093360.

The previous prime is 66205421. The next prime is 66205439. The reversal of 66205436 is 63450266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66205439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 752291 + ... + 752378.

It is an arithmetic number, because the mean of its divisors is an integer number (10532690).

Almost surely, 2^66205436 is an apocalyptic number.

It is an amenable number.

66205436 is a deficient number, since it is larger than the sum of its proper divisors (60186844).

66205436 is a wasteful number, since it uses less digits than its factorization.

66205436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504684 (or 1504682 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 66205436 is about 8136.6722927742. The cubic root of 66205436 is about 404.5428688683.

It can be divided in two parts, 66 and 205436, that added together give a palindrome (205502).

The spelling of 66205436 in words is "sixty-six million, two hundred five thousand, four hundred thirty-six".