1066166665064 has 16 divisors (see below), whose sum is σ = 2053091213700. Its totient is φ = 518675674752.

The previous prime is 1066166665061. The next prime is 1066166665079. The reversal of 1066166665064 is 4605666616601.

It can be written as a sum of positive squares in 2 ways, for example, as 875800248964 + 190366416100 = 935842^2 + 436310^2 .

It is a super-2 number, since 2×1066166665064² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1066166664997 and 1066166665015.

It is not an unprimeable number, because it can be changed into a prime (1066166665061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1800956909 + ... + 1800957500.

Almost surely, 2^{1066166665064} is an apocalyptic number.

It is an amenable number.

1066166665064 is a deficient number, since it is larger than the sum of its proper divisors (986924548636).

1066166665064 is a wasteful number, since it uses less digits than its factorization.

1066166665064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601914452 (or 3601914448 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 53.

The spelling of 1066166665064 in words is "one trillion, sixty-six billion, one hundred sixty-six million, six hundred sixty-five thousand, sixty-four".