66330313 has 4 divisors (see below), whose sum is σ = 75806080. Its totient is φ = 56854548.

The previous prime is 66330283. The next prime is 66330323. The reversal of 66330313 is 31303366.

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 66330313 - 2⁵ = 66330281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66330323) 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, 4737873 + ... + 4737886.

It is an arithmetic number, because the mean of its divisors is an integer number (18951520).

Almost surely, 2^66330313 is an apocalyptic number.

It is an amenable number.

66330313 is a deficient number, since it is larger than the sum of its proper divisors (9475767).

66330313 is an equidigital number, since it uses as much as digits as its factorization.

66330313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9475766.

The product of its (nonzero) digits is 2916, while the sum is 25.

The square root of 66330313 is about 8144.3423921149. The cubic root of 66330313 is about 404.7970593277.

Adding to 66330313 its reverse (31303366), we get a palindrome (97633679).

It can be divided in two parts, 663 and 30313, that added together give a square (30976 = 176²).

The spelling of 66330313 in words is "sixty-six million, three hundred thirty thousand, three hundred thirteen".