81066367 has 2 divisors, whose sum is σ = 81066368. Its totient is φ = 81066366.

The previous prime is 81066317. The next prime is 81066383. The reversal of 81066367 is 76366018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81066367 - 2⁷ = 81066239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81066317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40533183 + 40533184.

It is an arithmetic number, because the mean of its divisors is an integer number (40533184).

Almost surely, 2^81066367 is an apocalyptic number.

81066367 is a deficient number, since it is larger than the sum of its proper divisors (1).

81066367 is an equidigital number, since it uses as much as digits as its factorization.

81066367 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 81066367 is about 9003.6863006215. The cubic root of 81066367 is about 432.7930089282.

The spelling of 81066367 in words is "eighty-one million, sixty-six thousand, three hundred sixty-seven".