105661066578 has 16 divisors (see below), whose sum is σ = 211481397120. Its totient is φ = 35193811536.

The previous prime is 105661066541. The next prime is 105661066661. The reversal of 105661066578 is 875660166501.

It is a super-2 number, since 2×105661066578² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 105661066578.

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, 6627373 + ... + 6643296.

It is an arithmetic number, because the mean of its divisors is an integer number (13217587320).

Almost surely, 2^105661066578 is an apocalyptic number.

105661066578 is an abundant number, since it is smaller than the sum of its proper divisors (105820330542).

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

105661066578 is a wasteful number, since it uses less digits than its factorization.

105661066578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13272001.

The product of its (nonzero) digits is 1814400, while the sum is 51.

The spelling of 105661066578 in words is "one hundred five billion, six hundred sixty-one million, sixty-six thousand, five hundred seventy-eight".