66240075287 has 2 divisors, whose sum is σ = 66240075288. Its totient is φ = 66240075286.

The previous prime is 66240075197. The next prime is 66240075299. The reversal of 66240075287 is 78257004266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66240075287 - 2¹⁶ = 66240009751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66240005287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33120037643 + 33120037644.

It is an arithmetic number, because the mean of its divisors is an integer number (33120037644).

Almost surely, 2^66240075287 is an apocalyptic number.

66240075287 is a deficient number, since it is larger than the sum of its proper divisors (1).

66240075287 is an equidigital number, since it uses as much as digits as its factorization.

66240075287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 66240075287 in words is "sixty-six billion, two hundred forty million, seventy-five thousand, two hundred eighty-seven".