82566091 has 2 divisors, whose sum is σ = 82566092. Its totient is φ = 82566090.

The previous prime is 82566073. The next prime is 82566119. The reversal of 82566091 is 19066528.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82566091 - 2²³ = 74177483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82566091.

It is not a weakly prime, because it can be changed into another prime (82566031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41283045 + 41283046.

It is an arithmetic number, because the mean of its divisors is an integer number (41283046).

Almost surely, 2^82566091 is an apocalyptic number.

82566091 is a deficient number, since it is larger than the sum of its proper divisors (1).

82566091 is an equidigital number, since it uses as much as digits as its factorization.

82566091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 82566091 is about 9086.5885237530. The cubic root of 82566091 is about 435.4456014267.

The spelling of 82566091 in words is "eighty-two million, five hundred sixty-six thousand, ninety-one".