81082667 has 2 divisors, whose sum is σ = 81082668. Its totient is φ = 81082666.

The previous prime is 81082643. The next prime is 81082679. The reversal of 81082667 is 76628018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81082667 - 2¹⁰ = 81081643 is a prime.

It is a Chen prime.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 81082667.

It is not a weakly prime, because it can be changed into another prime (81082607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40541333 + 40541334.

It is an arithmetic number, because the mean of its divisors is an integer number (40541334).

Almost surely, 2^81082667 is an apocalyptic number.

81082667 is a deficient number, since it is larger than the sum of its proper divisors (1).

81082667 is an equidigital number, since it uses as much as digits as its factorization.

81082667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 81082667 is about 9004.5914399266. The cubic root of 81082667 is about 432.8220141887.

The spelling of 81082667 in words is "eighty-one million, eighty-two thousand, six hundred sixty-seven".