82660247 has 2 divisors, whose sum is σ = 82660248. Its totient is φ = 82660246.

The previous prime is 82660243. The next prime is 82660267. The reversal of 82660247 is 74206628.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82660247 - 2² = 82660243 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82660243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41330123 + 41330124.

It is an arithmetic number, because the mean of its divisors is an integer number (41330124).

Almost surely, 2^82660247 is an apocalyptic number.

82660247 is a deficient number, since it is larger than the sum of its proper divisors (1).

82660247 is an equidigital number, since it uses as much as digits as its factorization.

82660247 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 35.

The square root of 82660247 is about 9091.7680898712. The cubic root of 82660247 is about 435.6110617685.

The spelling of 82660247 in words is "eighty-two million, six hundred sixty thousand, two hundred forty-seven".