66086699 has 16 divisors (see below), whose sum is σ = 80080896. Its totient is φ = 53330400.

The previous prime is 66086687. The next prime is 66086717. The reversal of 66086699 is 99668066.

It is a cyclic number.

It is not a de Polignac number, because 66086699 - 2¹² = 66082603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66086639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3914 + ... + 12144.

It is an arithmetic number, because the mean of its divisors is an integer number (5005056).

Almost surely, 2^66086699 is an apocalyptic number.

66086699 is a deficient number, since it is larger than the sum of its proper divisors (13994197).

66086699 is a wasteful number, since it uses less digits than its factorization.

66086699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8306.

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 66086699 is about 8129.3726080184. The cubic root of 66086699 is about 404.3008799218.

The spelling of 66086699 in words is "sixty-six million, eighty-six thousand, six hundred ninety-nine".