866063197 has 2 divisors, whose sum is σ = 866063198. Its totient is φ = 866063196.

The previous prime is 866063153. The next prime is 866063203. The reversal of 866063197 is 791360668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541306756 + 324756441 = 23266^2 + 18021^2 .

It is a cyclic number.

It is not a de Polignac number, because 866063197 - 2⁷ = 866063069 is a prime.

It is a super-2 number, since 2×866063197² = 1500130922395721618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866063117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433031598 + 433031599.

It is an arithmetic number, because the mean of its divisors is an integer number (433031599).

Almost surely, 2^866063197 is an apocalyptic number.

It is an amenable number.

866063197 is a deficient number, since it is larger than the sum of its proper divisors (1).

866063197 is an equidigital number, since it uses as much as digits as its factorization.

866063197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 866063197 is about 29428.9516802757. The cubic root of 866063197 is about 953.1981584006.

The spelling of 866063197 in words is "eight hundred sixty-six million, sixty-three thousand, one hundred ninety-seven".