1666056150065 has 16 divisors (see below), whose sum is σ = 2121182743680. Its totient is φ = 1251887374080.

The previous prime is 1666056150061. The next prime is 1666056150097. The reversal of 1666056150065 is 5600516506661.

It is not a de Polignac number, because 1666056150065 - 2² = 1666056150061 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1666056150061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19918205 + ... + 20001674.

It is an arithmetic number, because the mean of its divisors is an integer number (132573921480).

Almost surely, 2^{1666056150065} is an apocalyptic number.

It is an amenable number.

1666056150065 is a deficient number, since it is larger than the sum of its proper divisors (455126593615).

1666056150065 is a wasteful number, since it uses less digits than its factorization.

1666056150065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39920392.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 1666056150065 in words is "one trillion, six hundred sixty-six billion, fifty-six million, one hundred fifty thousand, sixty-five".