66682211 has 8 divisors (see below), whose sum is σ = 71763264. Its totient is φ = 61729920.

The previous prime is 66682199. The next prime is 66682247. The reversal of 66682211 is 11228666.

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 66682211 - 2¹⁴ = 66665827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66682411) 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, 31115 + ... + 33188.

It is an arithmetic number, because the mean of its divisors is an integer number (8970408).

Almost surely, 2^66682211 is an apocalyptic number.

66682211 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

66682211 is a deficient number, since it is larger than the sum of its proper divisors (5081053).

66682211 is a wasteful number, since it uses less digits than its factorization.

66682211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64381.

The product of its digits is 6912, while the sum is 32.

The square root of 66682211 is about 8165.9176459232. The cubic root of 66682211 is about 405.5116451809.

The spelling of 66682211 in words is "sixty-six million, six hundred eighty-two thousand, two hundred eleven".