66744851 has 2 divisors, whose sum is σ = 66744852. Its totient is φ = 66744850.

The previous prime is 66744833. The next prime is 66744857. The reversal of 66744851 is 15844766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66744851 - 2⁶ = 66744787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66744799 and 66744808.

It is not a weakly prime, because it can be changed into another prime (66744857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33372425 + 33372426.

It is an arithmetic number, because the mean of its divisors is an integer number (33372426).

Almost surely, 2^66744851 is an apocalyptic number.

66744851 is a deficient number, since it is larger than the sum of its proper divisors (1).

66744851 is an equidigital number, since it uses as much as digits as its factorization.

66744851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 41.

The square root of 66744851 is about 8169.7521994244. The cubic root of 66744851 is about 405.6385820826.

The spelling of 66744851 in words is "sixty-six million, seven hundred forty-four thousand, eight hundred fifty-one".