66370331 has 2 divisors, whose sum is σ = 66370332. Its totient is φ = 66370330.

The previous prime is 66370321. The next prime is 66370361. The reversal of 66370331 is 13307366.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66370331 is a prime.

It is a super-2 number, since 2×66370331² = 8810041674099122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 66370294 and 66370303.

It is not a weakly prime, because it can be changed into another prime (66370301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33185165 + 33185166.

It is an arithmetic number, because the mean of its divisors is an integer number (33185166).

Almost surely, 2^66370331 is an apocalyptic number.

66370331 is a deficient number, since it is larger than the sum of its proper divisors (1).

66370331 is an equidigital number, since it uses as much as digits as its factorization.

66370331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 29.

The square root of 66370331 is about 8146.7988191682. The cubic root of 66370331 is about 404.8784495265.

Adding to 66370331 its reverse (13307366), we get a palindrome (79677697).

The spelling of 66370331 in words is "sixty-six million, three hundred seventy thousand, three hundred thirty-one".