66011311 has 16 divisors (see below), whose sum is σ = 70479360. Its totient is φ = 61696800.

The previous prime is 66011303. The next prime is 66011329. The reversal of 66011311 is 11311066.

It is a cyclic number.

It is not a de Polignac number, because 66011311 - 2³ = 66011303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66011411) 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, 288145 + ... + 288373.

It is an arithmetic number, because the mean of its divisors is an integer number (4404960).

Almost surely, 2^66011311 is an apocalyptic number.

66011311 is a deficient number, since it is larger than the sum of its proper divisors (4468049).

66011311 is a wasteful number, since it uses less digits than its factorization.

66011311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 66011311 is about 8124.7345187397. The cubic root of 66011311 is about 404.1470868374.

Adding to 66011311 its reverse (11311066), we get a palindrome (77322377).

The spelling of 66011311 in words is "sixty-six million, eleven thousand, three hundred eleven".