8866851840 has 1408 divisors, whose sum is σ = 42446592000. Its totient is φ = 1734082560.

The previous prime is 8866851817. The next prime is 8866851841. The reversal of 8866851840 is 481586688.

8866851840 is a `hidden beast` number, since 8 + 86 + 6 + 8 + 518 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (1408).

It is a super-2 number, since 2×8866851840² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (8866851841) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 521579512 + ... + 521579528.

Almost surely, 2^8866851840 is an apocalyptic number.

8866851840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8866851840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21223296000).

8866851840 is an abundant number, since it is smaller than the sum of its proper divisors (33579740160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8866851840 is a wasteful number, since it uses less digits than its factorization.

8866851840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 54.

The square root of 8866851840 is about 94163.9625334448. The cubic root of 8866851840 is about 2069.7750648254.

The spelling of 8866851840 in words is "eight billion, eight hundred sixty-six million, eight hundred fifty-one thousand, eight hundred forty".