66000311 has 4 divisors (see below), whose sum is σ = 71077272. Its totient is φ = 60923352.

The previous prime is 66000299. The next prime is 66000329. The reversal of 66000311 is 11300066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11300066 = 2 ⋅5650033.

It is a cyclic number.

It is not a de Polignac number, because 66000311 - 2⁶ = 66000247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66000311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66000331) 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, 2538461 + ... + 2538486.

It is an arithmetic number, because the mean of its divisors is an integer number (17769318).

Almost surely, 2^66000311 is an apocalyptic number.

66000311 is a deficient number, since it is larger than the sum of its proper divisors (5076961).

66000311 is a wasteful number, since it uses less digits than its factorization.

66000311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076960.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 66000311 is about 8124.0575453403. The cubic root of 66000311 is about 404.1246368216.

Adding to 66000311 its reverse (11300066), we get a palindrome (77300377).

The spelling of 66000311 in words is "sixty-six million, three hundred eleven", and thus it is an aban number.