866117497 has 16 divisors (see below), whose sum is σ = 1041409152. Its totient is φ = 704695680.

The previous prime is 866117491. The next prime is 866117503. The reversal of 866117497 is 794711668.

It is an interprime number because it is at equal distance from previous prime (866117491) and next prime (866117503).

It is a cyclic number.

It is not a de Polignac number, because 866117497 - 2¹¹ = 866115449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 866117497.

It is not an unprimeable number, because it can be changed into a prime (866117491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30163 + ... + 51400.

It is an arithmetic number, because the mean of its divisors is an integer number (65088072).

Almost surely, 2^866117497 is an apocalyptic number.

It is an amenable number.

866117497 is a deficient number, since it is larger than the sum of its proper divisors (175291655).

866117497 is a wasteful number, since it uses less digits than its factorization.

866117497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81648.

The product of its digits is 508032, while the sum is 49.

The square root of 866117497 is about 29429.8742267105. The cubic root of 866117497 is about 953.2180790325.

The spelling of 866117497 in words is "eight hundred sixty-six million, one hundred seventeen thousand, four hundred ninety-seven".