866506965 has 8 divisors (see below), whose sum is σ = 1386411168. Its totient is φ = 462137040.

The previous prime is 866506961. The next prime is 866506973. The reversal of 866506965 is 569605668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 866506965 - 2² = 866506961 is a prime.

It is a super-2 number, since 2×866506965² = 1501668640787022450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866506961) 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 in 7 ways as a sum of consecutive naturals, for example, 28883551 + ... + 28883580.

It is an arithmetic number, because the mean of its divisors is an integer number (173301396).

Almost surely, 2^866506965 is an apocalyptic number.

It is an amenable number.

866506965 is a deficient number, since it is larger than the sum of its proper divisors (519904203).

866506965 is a wasteful number, since it uses less digits than its factorization.

866506965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57767139.

The product of its (nonzero) digits is 2332800, while the sum is 51.

The square root of 866506965 is about 29436.4903648516. The cubic root of 866506965 is about 953.3609358263.

The spelling of 866506965 in words is "eight hundred sixty-six million, five hundred six thousand, nine hundred sixty-five".