8061729866 has 16 divisors (see below), whose sum is σ = 12410181888. Its totient is φ = 3926286000.

The previous prime is 8061729859. The next prime is 8061729869. The reversal of 8061729866 is 6689271608.

It is not an unprimeable number, because it can be changed into a prime (8061729869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308210 + ... + 333341.

It is an arithmetic number, because the mean of its divisors is an integer number (775636368).

Almost surely, 2^8061729866 is an apocalyptic number.

8061729866 is a deficient number, since it is larger than the sum of its proper divisors (4348452022).

8061729866 is a wasteful number, since it uses less digits than its factorization.

8061729866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641717.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 8061729866 is about 89787.1364171951. The cubic root of 8061729866 is about 2005.1309807613.

The spelling of 8061729866 in words is "eight billion, sixty-one million, seven hundred twenty-nine thousand, eight hundred sixty-six".