866655422 has 4 divisors (see below), whose sum is σ = 1299983136. Its totient is φ = 433327710.

The previous prime is 866655397. The next prime is 866655443. The reversal of 866655422 is 224556668.

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

It is a nialpdrome in base 10.

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, 216663854 + ... + 216663857.

It is an arithmetic number, because the mean of its divisors is an integer number (324995784).

Almost surely, 2^866655422 is an apocalyptic number.

866655422 is a deficient number, since it is larger than the sum of its proper divisors (433327714).

866655422 is a wasteful number, since it uses less digits than its factorization.

866655422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433327713.

The product of its digits is 691200, while the sum is 44.

The square root of 866655422 is about 29439.0119059727. The cubic root of 866655422 is about 953.4153785595.

The spelling of 866655422 in words is "eight hundred sixty-six million, six hundred fifty-five thousand, four hundred twenty-two".