866633697 has 6 divisors (see below), whose sum is σ = 1251804242. Its totient is φ = 577755792.

The previous prime is 866633683. The next prime is 866633717. The reversal of 866633697 is 796336668.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 459845136 + 406788561 = 21444^2 + 20169^2 .

It is not a de Polignac number, because 866633697 - 2¹⁶ = 866568161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866633197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48146308 + ... + 48146325.

Almost surely, 2^866633697 is an apocalyptic number.

It is an amenable number.

866633697 is a deficient number, since it is larger than the sum of its proper divisors (385170545).

866633697 is a wasteful number, since it uses less digits than its factorization.

866633697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96292639 (or 96292636 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 54.

The square root of 866633697 is about 29438.6429204880. The cubic root of 866633697 is about 953.4074118706.

The spelling of 866633697 in words is "eight hundred sixty-six million, six hundred thirty-three thousand, six hundred ninety-seven".