66122313 has 4 divisors (see below), whose sum is σ = 88163088. Its totient is φ = 44081540.

The previous prime is 66122311. The next prime is 66122317. The reversal of 66122313 is 31322166.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66122313 - 2¹ = 66122311 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66122311) 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, 11020383 + ... + 11020388.

It is an arithmetic number, because the mean of its divisors is an integer number (22040772).

Almost surely, 2^66122313 is an apocalyptic number.

It is an amenable number.

66122313 is a deficient number, since it is larger than the sum of its proper divisors (22040775).

66122313 is a wasteful number, since it uses less digits than its factorization.

66122313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22040774.

The product of its digits is 1296, while the sum is 24.

The square root of 66122313 is about 8131.5627649302. The cubic root of 66122313 is about 404.3734925455.

Adding to 66122313 its reverse (31322166), we get a palindrome (97444479).

The spelling of 66122313 in words is "sixty-six million, one hundred twenty-two thousand, three hundred thirteen".