66896743 has 2 divisors, whose sum is σ = 66896744. Its totient is φ = 66896742.

The previous prime is 66896741. The next prime is 66896779. The reversal of 66896743 is 34769866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66896743 - 2¹ = 66896741 is a prime.

Together with 66896741, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66896741) 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, 33448371 + 33448372.

It is an arithmetic number, because the mean of its divisors is an integer number (33448372).

Almost surely, 2^66896743 is an apocalyptic number.

66896743 is a deficient number, since it is larger than the sum of its proper divisors (1).

66896743 is an equidigital number, since it uses as much as digits as its factorization.

66896743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 49.

The square root of 66896743 is about 8179.0429146692. The cubic root of 66896743 is about 405.9460543725.

It can be divided in two parts, 66 and 896743, that added together give a square (896809 = 947²).

The spelling of 66896743 in words is "sixty-six million, eight hundred ninety-six thousand, seven hundred forty-three".