66387067 has 2 divisors, whose sum is σ = 66387068. Its totient is φ = 66387066.

The previous prime is 66387047. The next prime is 66387071. The reversal of 66387067 is 76078366.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66387067 is a prime.

It is not a weakly prime, because it can be changed into another prime (66387037) 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, 33193533 + 33193534.

It is an arithmetic number, because the mean of its divisors is an integer number (33193534).

Almost surely, 2^66387067 is an apocalyptic number.

66387067 is a deficient number, since it is larger than the sum of its proper divisors (1).

66387067 is an equidigital number, since it uses as much as digits as its factorization.

66387067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 66387067 is about 8147.8259063385. The cubic root of 66387067 is about 404.9124781663.

The spelling of 66387067 in words is "sixty-six million, three hundred eighty-seven thousand, sixty-seven".