866557441 has 8 divisors (see below), whose sum is σ = 873024768. Its totient is φ = 860100000.

The previous prime is 866557429. The next prime is 866557451. The reversal of 866557441 is 144755668.

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

It is a cyclic number.

It is not a de Polignac number, because 866557441 - 2⁷ = 866557313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866557391 and 866557400.

It is not an unprimeable number, because it can be changed into a prime (866557421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353781 + ... + 356221.

It is an arithmetic number, because the mean of its divisors is an integer number (109128096).

Almost surely, 2^866557441 is an apocalyptic number.

It is an amenable number.

866557441 is a deficient number, since it is larger than the sum of its proper divisors (6467327).

866557441 is a wasteful number, since it uses less digits than its factorization.

866557441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943.

The product of its digits is 806400, while the sum is 46.

The square root of 866557441 is about 29437.3477235977. The cubic root of 866557441 is about 953.3794472806.

The spelling of 866557441 in words is "eight hundred sixty-six million, five hundred fifty-seven thousand, four hundred forty-one".