66410387 has 2 divisors, whose sum is σ = 66410388. Its totient is φ = 66410386.

The previous prime is 66410369. The next prime is 66410417. The reversal of 66410387 is 78301466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66410387 - 2²⁰ = 65361811 is a prime.

It is not a weakly prime, because it can be changed into another prime (66410327) 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, 33205193 + 33205194.

It is an arithmetic number, because the mean of its divisors is an integer number (33205194).

Almost surely, 2^66410387 is an apocalyptic number.

66410387 is a deficient number, since it is larger than the sum of its proper divisors (1).

66410387 is an equidigital number, since it uses as much as digits as its factorization.

66410387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 66410387 is about 8149.2568372828. The cubic root of 66410387 is about 404.9598842550.

The spelling of 66410387 in words is "sixty-six million, four hundred ten thousand, three hundred eighty-seven".