66744607 has 2 divisors, whose sum is σ = 66744608. Its totient is φ = 66744606.

The previous prime is 66744593. The next prime is 66744641. The reversal of 66744607 is 70644766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66744607 - 2⁷ = 66744479 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66744607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66744647) 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, 33372303 + 33372304.

It is an arithmetic number, because the mean of its divisors is an integer number (33372304).

Almost surely, 2^66744607 is an apocalyptic number.

66744607 is a deficient number, since it is larger than the sum of its proper divisors (1).

66744607 is an equidigital number, since it uses as much as digits as its factorization.

66744607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 40.

The square root of 66744607 is about 8169.7372662773. The cubic root of 66744607 is about 405.6380877826.

The spelling of 66744607 in words is "sixty-six million, seven hundred forty-four thousand, six hundred seven".