211199966 has 8 divisors (see below), whose sum is σ = 316910880. Its totient is φ = 105563008.

The previous prime is 211199951. The next prime is 211199977. The reversal of 211199966 is 669991112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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, 10691 + ... + 23166.

It is an arithmetic number, because the mean of its divisors is an integer number (39613860).

Almost surely, 2^211199966 is an apocalyptic number.

211199966 is a deficient number, since it is larger than the sum of its proper divisors (105710914).

211199966 is a wasteful number, since it uses less digits than its factorization.

211199966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36978.

The product of its digits is 52488, while the sum is 44.

The square root of 211199966 is about 14532.7205298939. The cubic root of 211199966 is about 595.5221892248.

The spelling of 211199966 in words is "two hundred eleven million, one hundred ninety-nine thousand, nine hundred sixty-six".