83566081 has 4 divisors (see below), whose sum is σ = 86447700. Its totient is φ = 80684464.

The previous prime is 83566057. The next prime is 83566103. The reversal of 83566081 is 18066538.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28569025 + 54997056 = 5345^2 + 7416^2 .

It is a cyclic number.

It is not a de Polignac number, because 83566081 - 2²¹ = 81468929 is a prime.

It is a super-2 number, since 2×83566081² = 13966579787397122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83566081.

It is not an unprimeable number, because it can be changed into a prime (83566031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440766 + ... + 1440823.

It is an arithmetic number, because the mean of its divisors is an integer number (21611925).

Almost surely, 2^83566081 is an apocalyptic number.

It is an amenable number.

83566081 is a deficient number, since it is larger than the sum of its proper divisors (2881619).

83566081 is a wasteful number, since it uses less digits than its factorization.

83566081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881618.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 83566081 is about 9141.4485176038. The cubic root of 83566081 is about 437.1965019990.

The spelling of 83566081 in words is "eighty-three million, five hundred sixty-six thousand, eighty-one".