8666778624 has 176 divisors, whose sum is σ = 27253856256. Its totient is φ = 2396160000.

The previous prime is 8666778611. The next prime is 8666778629. The reversal of 8666778624 is 4268776668.

It is a super-2 number, since 2×8666778624² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8666778629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660124 + ... + 673124.

It is an arithmetic number, because the mean of its divisors is an integer number (154851456).

Almost surely, 2^8666778624 is an apocalyptic number.

8666778624 is a gapful number since it is divisible by the number (84) 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 8666778624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13626928128).

8666778624 is an abundant number, since it is smaller than the sum of its proper divisors (18587077632).

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

8666778624 is a wasteful number, since it uses less digits than its factorization.

8666778624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13062 (or 13044 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 60.

The square root of 8666778624 is about 93095.5349305218. The cubic root of 8666778624 is about 2054.0888941856.

The spelling of 8666778624 in words is "eight billion, six hundred sixty-six million, seven hundred seventy-eight thousand, six hundred twenty-four".