66311313 has 16 divisors (see below), whose sum is σ = 93415680. Its totient is φ = 41772416.

The previous prime is 66311299. The next prime is 66311327. The reversal of 66311313 is 31311366.

It is an interprime number because it is at equal distance from previous prime (66311299) and next prime (66311327).

It is a cyclic number.

It is not a de Polignac number, because 66311313 - 2⁵ = 66311281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66311383) 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, 4020 + ... + 12197.

It is an arithmetic number, because the mean of its divisors is an integer number (5838480).

Almost surely, 2^66311313 is an apocalyptic number.

It is an amenable number.

66311313 is a deficient number, since it is larger than the sum of its proper divisors (27104367).

66311313 is a wasteful number, since it uses less digits than its factorization.

66311313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16296.

The product of its digits is 972, while the sum is 24.

The square root of 66311313 is about 8143.1758546651. The cubic root of 66311313 is about 404.7584049114.

Adding to 66311313 its reverse (31311366), we get a palindrome (97622679).

The spelling of 66311313 in words is "sixty-six million, three hundred eleven thousand, three hundred thirteen".