66211411 has 8 divisors (see below), whose sum is σ = 78960384. Its totient is φ = 54285000.

The previous prime is 66211361. The next prime is 66211421. The reversal of 66211411 is 11411266.

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

It is not a de Polignac number, because 66211411 - 2¹⁵ = 66178643 is a prime.

It is a super-2 number, since 2×66211411² = 8767901893221842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66211421) 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, 205465 + ... + 205786.

It is an arithmetic number, because the mean of its divisors is an integer number (9870048).

Almost surely, 2^66211411 is an apocalyptic number.

66211411 is a deficient number, since it is larger than the sum of its proper divisors (12748973).

66211411 is a wasteful number, since it uses less digits than its factorization.

66211411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411281.

The product of its digits is 288, while the sum is 22.

The square root of 66211411 is about 8137.0394493329. The cubic root of 66211411 is about 404.5550384174. Note that the first 3 decimals are identical.

Adding to 66211411 its reverse (11411266), we get a palindrome (77622677).

The spelling of 66211411 in words is "sixty-six million, two hundred eleven thousand, four hundred eleven".