66045911 has 4 divisors (see below), whose sum is σ = 66378000. Its totient is φ = 65713824.

The previous prime is 66045907. The next prime is 66045913. The reversal of 66045911 is 11954066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66045911 - 2² = 66045907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66045913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165746 + ... + 166143.

It is an arithmetic number, because the mean of its divisors is an integer number (16594500).

Almost surely, 2^66045911 is an apocalyptic number.

66045911 is a deficient number, since it is larger than the sum of its proper divisors (332089).

66045911 is a wasteful number, since it uses less digits than its factorization.

66045911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332088.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 66045911 is about 8126.8635401365. The cubic root of 66045911 is about 404.2176860854.

Adding to 66045911 its reverse (11954066), we get a palindrome (77999977).

The spelling of 66045911 in words is "sixty-six million, forty-five thousand, nine hundred eleven".