866625707 has 2 divisors, whose sum is σ = 866625708. Its totient is φ = 866625706.

The previous prime is 866625703. The next prime is 866625709. The reversal of 866625707 is 707526668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866625707 - 2² = 866625703 is a prime.

Together with 866625709, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (866625703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433312853 + 433312854.

It is an arithmetic number, because the mean of its divisors is an integer number (433312854).

Almost surely, 2^866625707 is an apocalyptic number.

866625707 is a deficient number, since it is larger than the sum of its proper divisors (1).

866625707 is an equidigital number, since it uses as much as digits as its factorization.

866625707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 47.

The square root of 866625707 is about 29438.5072141914. The cubic root of 866625707 is about 953.4044818559.

The spelling of 866625707 in words is "eight hundred sixty-six million, six hundred twenty-five thousand, seven hundred seven".