5866891861 has 8 divisors (see below), whose sum is σ = 5941871064. Its totient is φ = 5792317440.

The previous prime is 5866891829. The next prime is 5866891867. The reversal of 5866891861 is 1681986685.

It can be written as a sum of positive squares in 4 ways, for example, as 846460836 + 5020431025 = 29094^2 + 70855^2 .

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 5866891861 - 2⁵ = 5866891829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5866891796 and 5866891805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5866891867) 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, 71970 + ... + 130051.

It is an arithmetic number, because the mean of its divisors is an integer number (742733883).

Almost surely, 2^5866891861 is an apocalyptic number.

It is an amenable number.

5866891861 is a deficient number, since it is larger than the sum of its proper divisors (74979203).

5866891861 is a wasteful number, since it uses less digits than its factorization.

5866891861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202391.

The product of its digits is 4976640, while the sum is 58.

The square root of 5866891861 is about 76595.6386552133. The cubic root of 5866891861 is about 1803.5825624843.

The spelling of 5866891861 in words is "five billion, eight hundred sixty-six million, eight hundred ninety-one thousand, eight hundred sixty-one".