166601160066655 has 32 divisors (see below), whose sum is σ = 216850628554560. Its totient is φ = 122377845473280.

The previous prime is 166601160066629. The next prime is 166601160066659. The reversal of 166601160066655 is 556660061106661.

It is not a de Polignac number, because 166601160066655 - 2⁷ = 166601160066527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166601160066596 and 166601160066605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166601160066659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124687432 + ... + 126016498.

It is an arithmetic number, because the mean of its divisors is an integer number (6776582142330).

Almost surely, 2^{166601160066655} is an apocalyptic number.

166601160066655 is a deficient number, since it is larger than the sum of its proper divisors (50249468487905).

166601160066655 is a wasteful number, since it uses less digits than its factorization.

166601160066655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365099.

The product of its (nonzero) digits is 6998400, while the sum is 55.

The spelling of 166601160066655 in words is "one hundred sixty-six trillion, six hundred one billion, one hundred sixty million, sixty-six thousand, six hundred fifty-five".