866688074 has 32 divisors (see below), whose sum is σ = 1537011840. Its totient is φ = 358769088.

The previous prime is 866688029. The next prime is 866688077. The reversal of 866688074 is 470886668.

It is a happy number.

It is a super-2 number, since 2×866688074² = 1502296435227658952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (866688077) 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, 65984 + ... + 78020.

It is an arithmetic number, because the mean of its divisors is an integer number (48031620).

Almost surely, 2^866688074 is an apocalyptic number.

866688074 is a deficient number, since it is larger than the sum of its proper divisors (670323766).

866688074 is a wasteful number, since it uses less digits than its factorization.

866688074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12222.

The product of its (nonzero) digits is 3096576, while the sum is 53.

The square root of 866688074 is about 29439.5664709927. The cubic root of 866688074 is about 953.4273519948.

The spelling of 866688074 in words is "eight hundred sixty-six million, six hundred eighty-eight thousand, seventy-four".