866122047 has 24 divisors (see below), whose sum is σ = 1437217184. Its totient is φ = 492355584.

The previous prime is 866122043. The next prime is 866122067. The reversal of 866122047 is 740221668.

It is not a de Polignac number, because 866122047 - 2² = 866122043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866122043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23458 + ... + 47775.

Almost surely, 2^866122047 is an apocalyptic number.

866122047 is a deficient number, since it is larger than the sum of its proper divisors (571095137).

866122047 is a wasteful number, since it uses less digits than its factorization.

866122047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71439 (or 71436 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 866122047 is about 29429.9515290121. The cubic root of 866122047 is about 953.2197482189.

The spelling of 866122047 in words is "eight hundred sixty-six million, one hundred twenty-two thousand, forty-seven".