7866233856 has 132 divisors (see below), whose sum is σ = 24461150532. Its totient is φ = 2420342784.

The previous prime is 7866233839. The next prime is 7866233873. The reversal of 7866233856 is 6583326687.

7866233856 is a `hidden beast` number, since 7 + 8 + 6 + 623 + 3 + 8 + 5 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (7866233839) and next prime (7866233873).

It can be written as a sum of positive squares in 2 ways, for example, as 5128851456 + 2737382400 = 71616^2 + 52320^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86980 + ... + 152636.

Almost surely, 2^7866233856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7866233856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12230575266).

7866233856 is an abundant number, since it is smaller than the sum of its proper divisors (16594916676).

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

7866233856 is a wasteful number, since it uses less digits than its factorization.

7866233856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65696 (or 65675 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The square root of 7866233856 is about 88691.7913676345. The cubic root of 7866233856 is about 1988.7901078805.

The spelling of 7866233856 in words is "seven billion, eight hundred sixty-six million, two hundred thirty-three thousand, eight hundred fifty-six".