66213206 has 32 divisors (see below), whose sum is σ = 106444800. Its totient is φ = 30834720.

The previous prime is 66213193. The next prime is 66213209. The reversal of 66213206 is 60231266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66213209) 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, 346571 + ... + 346761.

It is an arithmetic number, because the mean of its divisors is an integer number (3326400).

Almost surely, 2^66213206 is an apocalyptic number.

66213206 is a deficient number, since it is larger than the sum of its proper divisors (40231594).

66213206 is a wasteful number, since it uses less digits than its factorization.

66213206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 66213206 is about 8137.1497466865. The cubic root of 66213206 is about 404.5586942311.

The spelling of 66213206 in words is "sixty-six million, two hundred thirteen thousand, two hundred six".