8066821586 has 16 divisors (see below), whose sum is σ = 12683629728. Its totient is φ = 3843520800.

The previous prime is 8066821571. The next prime is 8066821591. The reversal of 8066821586 is 6851286608.

It is a super-2 number, since 2×8066821586² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1140380 + ... + 1147431.

It is an arithmetic number, because the mean of its divisors is an integer number (792726858).

Almost surely, 2^8066821586 is an apocalyptic number.

8066821586 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

8066821586 is a deficient number, since it is larger than the sum of its proper divisors (4616808142).

8066821586 is a wasteful number, since it uses less digits than its factorization.

8066821586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2287897.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The square root of 8066821586 is about 89815.4863372681. The cubic root of 8066821586 is about 2005.5530331419.

The spelling of 8066821586 in words is "eight billion, sixty-six million, eight hundred twenty-one thousand, five hundred eighty-six".