66093893 has 2 divisors, whose sum is σ = 66093894. Its totient is φ = 66093892.

The previous prime is 66093887. The next prime is 66093899. The reversal of 66093893 is 39839066.

It is a balanced prime because it is at equal distance from previous prime (66093887) and next prime (66093899).

It can be written as a sum of positive squares in only one way, i.e., 49308484 + 16785409 = 7022^2 + 4097^2 .

It is a cyclic number.

It is not a de Polignac number, because 66093893 - 2¹⁴ = 66077509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66093899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33046946 + 33046947.

It is an arithmetic number, because the mean of its divisors is an integer number (33046947).

Almost surely, 2^66093893 is an apocalyptic number.

It is an amenable number.

66093893 is a deficient number, since it is larger than the sum of its proper divisors (1).

66093893 is an equidigital number, since it uses as much as digits as its factorization.

66093893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 66093893 is about 8129.8150655473. The cubic root of 66093893 is about 404.3155497169.

The spelling of 66093893 in words is "sixty-six million, ninety-three thousand, eight hundred ninety-three".