66896783 has 2 divisors, whose sum is σ = 66896784. Its totient is φ = 66896782.

The previous prime is 66896779. The next prime is 66896821. The reversal of 66896783 is 38769866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66896783 - 2² = 66896779 is a prime.

It is a Sophie Germain prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66896723) 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, 33448391 + 33448392.

It is an arithmetic number, because the mean of its divisors is an integer number (33448392).

Almost surely, 2^66896783 is an apocalyptic number.

66896783 is a deficient number, since it is larger than the sum of its proper divisors (1).

66896783 is an equidigital number, since it uses as much as digits as its factorization.

66896783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 53.

The square root of 66896783 is about 8179.0453599427. The cubic root of 66896783 is about 405.9461352824.

The spelling of 66896783 in words is "sixty-six million, eight hundred ninety-six thousand, seven hundred eighty-three".