83645866 has 12 divisors (see below), whose sum is σ = 132421122. Its totient is φ = 39621384.

The previous prime is 83645857. The next prime is 83645867. The reversal of 83645866 is 66854638.

It can be written as a sum of positive squares in only one way, i.e., 76055841 + 7590025 = 8721^2 + 2755^2 .

It is not an unprimeable number, because it can be changed into a prime (83645867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57205 + ... + 58648.

Almost surely, 2^83645866 is an apocalyptic number.

83645866 is a deficient number, since it is larger than the sum of its proper divisors (48775256).

83645866 is a wasteful number, since it uses less digits than its factorization.

83645866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115893 (or 115874 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The square root of 83645866 is about 9145.8113910139. The cubic root of 83645866 is about 437.3355960238.

The spelling of 83645866 in words is "eighty-three million, six hundred forty-five thousand, eight hundred sixty-six".