66745337 has 2 divisors, whose sum is σ = 66745338. Its totient is φ = 66745336.

The previous prime is 66745319. The next prime is 66745397. The reversal of 66745337 is 73354766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62267881 + 4477456 = 7891^2 + 2116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66745337 is a prime.

It is a super-2 number, since 2×66745337² = 8909880022487138, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66745294 and 66745303.

It is not a weakly prime, because it can be changed into another prime (66745397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33372668 + 33372669.

It is an arithmetic number, because the mean of its divisors is an integer number (33372669).

Almost surely, 2^66745337 is an apocalyptic number.

It is an amenable number.

66745337 is a deficient number, since it is larger than the sum of its proper divisors (1).

66745337 is an equidigital number, since it uses as much as digits as its factorization.

66745337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 41.

The square root of 66745337 is about 8169.7819432345. The cubic root of 66745337 is about 405.6395666273.

The spelling of 66745337 in words is "sixty-six million, seven hundred forty-five thousand, three hundred thirty-seven".