66317811 has 8 divisors (see below), whose sum is σ = 101055744. Its totient is φ = 37895880.

The previous prime is 66317789. The next prime is 66317813. The reversal of 66317811 is 11871366.

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

It is not a de Polignac number, because 66317811 - 2⁹ = 66317299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66317813) 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, 1578975 + ... + 1579016.

It is an arithmetic number, because the mean of its divisors is an integer number (12631968).

Almost surely, 2^66317811 is an apocalyptic number.

66317811 is a deficient number, since it is larger than the sum of its proper divisors (34737933).

66317811 is a wasteful number, since it uses less digits than its factorization.

66317811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158001.

The product of its digits is 6048, while the sum is 33.

The square root of 66317811 is about 8143.5748292749. The cubic root of 66317811 is about 404.7716255524.

The spelling of 66317811 in words is "sixty-six million, three hundred seventeen thousand, eight hundred eleven".