66085687 has 2 divisors, whose sum is σ = 66085688. Its totient is φ = 66085686.

The previous prime is 66085639. The next prime is 66085697. The reversal of 66085687 is 78658066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66085687 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66085627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33042843 + 33042844.

It is an arithmetic number, because the mean of its divisors is an integer number (33042844).

Almost surely, 2^66085687 is an apocalyptic number.

66085687 is a deficient number, since it is larger than the sum of its proper divisors (1).

66085687 is an equidigital number, since it uses as much as digits as its factorization.

66085687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 66085687 is about 8129.3103643544. The cubic root of 66085687 is about 404.2988161955.

The spelling of 66085687 in words is "sixty-six million, eighty-five thousand, six hundred eighty-seven".