66864722146 has 32 divisors (see below), whose sum is σ = 106727544000. Its totient is φ = 31367676480.

The previous prime is 66864722083. The next prime is 66864722173. The reversal of 66864722146 is 64122746866.

66864722146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66864722093 and 66864722102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179805 + ... + 407503.

It is an arithmetic number, because the mean of its divisors is an integer number (3335235750).

Almost surely, 2^66864722146 is an apocalyptic number.

66864722146 is a deficient number, since it is larger than the sum of its proper divisors (39862821854).

66864722146 is a wasteful number, since it uses less digits than its factorization.

66864722146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227874.

The product of its digits is 4644864, while the sum is 52.

The spelling of 66864722146 in words is "sixty-six billion, eight hundred sixty-four million, seven hundred twenty-two thousand, one hundred forty-six".