866745079 has 2 divisors, whose sum is σ = 866745080. Its totient is φ = 866745078.

The previous prime is 866745073. The next prime is 866745161. The reversal of 866745079 is 970547668.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866745079 - 2³ = 866745071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866745071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433372539 + 433372540.

It is an arithmetic number, because the mean of its divisors is an integer number (433372540).

Almost surely, 2^866745079 is an apocalyptic number.

866745079 is a deficient number, since it is larger than the sum of its proper divisors (1).

866745079 is an equidigital number, since it uses as much as digits as its factorization.

866745079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The square root of 866745079 is about 29440.5346249011. The cubic root of 866745079 is about 953.4482549149.

The spelling of 866745079 in words is "eight hundred sixty-six million, seven hundred forty-five thousand, seventy-nine".