66086771 has 2 divisors, whose sum is σ = 66086772. Its totient is φ = 66086770.

The previous prime is 66086767. The next prime is 66086777. The reversal of 66086771 is 17768066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66086771 - 2² = 66086767 is a prime.

It is a super-2 number, since 2×66086771² = 8734922602412882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66086777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33043385 + 33043386.

It is an arithmetic number, because the mean of its divisors is an integer number (33043386).

Almost surely, 2^66086771 is an apocalyptic number.

66086771 is a deficient number, since it is larger than the sum of its proper divisors (1).

66086771 is an equidigital number, since it uses as much as digits as its factorization.

66086771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 66086771 is about 8129.3770364032. The cubic root of 66086771 is about 404.3010267474.

The spelling of 66086771 in words is "sixty-six million, eighty-six thousand, seven hundred seventy-one".