866090447 has 8 divisors (see below), whose sum is σ = 878810112. Its totient is φ = 853385400.

The previous prime is 866090443. The next prime is 866090473. The reversal of 866090447 is 744090668.

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 866090447 - 2² = 866090443 is a prime.

It is a super-2 number, since 2×866090447² = 1500225324769319618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866090398 and 866090407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866090443) 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, 187358 + ... + 191924.

It is an arithmetic number, because the mean of its divisors is an integer number (109851264).

Almost surely, 2^866090447 is an apocalyptic number.

866090447 is a deficient number, since it is larger than the sum of its proper divisors (12719665).

866090447 is a wasteful number, since it uses less digits than its factorization.

866090447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7309.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 866090447 is about 29429.4146560886. The cubic root of 866090447 is about 953.2081555069.

The spelling of 866090447 in words is "eight hundred sixty-six million, ninety thousand, four hundred forty-seven".