866694854 has 4 divisors (see below), whose sum is σ = 1300042284. Its totient is φ = 433347426.

The previous prime is 866694847. The next prime is 866694877. The reversal of 866694854 is 458496668.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 866694854.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216673712 + ... + 216673715.

It is an arithmetic number, because the mean of its divisors is an integer number (325010571).

Almost surely, 2^866694854 is an apocalyptic number.

866694854 is a deficient number, since it is larger than the sum of its proper divisors (433347430).

866694854 is a wasteful number, since it uses less digits than its factorization.

866694854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433347429.

The product of its digits is 9953280, while the sum is 56.

The square root of 866694854 is about 29439.6816219198. The cubic root of 866694854 is about 953.4298381721.

The spelling of 866694854 in words is "eight hundred sixty-six million, six hundred ninety-four thousand, eight hundred fifty-four".