5866881781 has 24 divisors (see below), whose sum is σ = 6461441280. Its totient is φ = 5320320000.

The previous prime is 5866881701. The next prime is 5866881821. The reversal of 5866881781 is 1871886685.

It is a happy number.

It is not a de Polignac number, because 5866881781 - 2¹³ = 5866873589 is a prime.

It is a super-2 number, since 2×5866881781² = 68840603664459463922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5866881701) 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, 2247405 + ... + 2250013.

It is an arithmetic number, because the mean of its divisors is an integer number (269226720).

Almost surely, 2^5866881781 is an apocalyptic number.

It is an amenable number.

5866881781 is a deficient number, since it is larger than the sum of its proper divisors (594559499).

5866881781 is a wasteful number, since it uses less digits than its factorization.

5866881781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925 (or 2908 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 58.

The square root of 5866881781 is about 76595.5728550939. The cubic root of 5866881781 is about 1803.5815295624.

The spelling of 5866881781 in words is "five billion, eight hundred sixty-six million, eight hundred eighty-one thousand, seven hundred eighty-one".