1666564940041 has 8 divisors (see below), whose sum is σ = 1718750004224. Its totient is φ = 1614990227760.

The previous prime is 1666564940011. The next prime is 1666564940101. The reversal of 1666564940041 is 1400494656661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1666564940041 - 2⁷ = 1666564939913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666564940011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152582430 + ... + 152593351.

It is an arithmetic number, because the mean of its divisors is an integer number (214843750528).

Almost surely, 2^{1666564940041} is an apocalyptic number.

It is an amenable number.

1666564940041 is a deficient number, since it is larger than the sum of its proper divisors (52185064183).

1666564940041 is a wasteful number, since it uses less digits than its factorization.

1666564940041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305175951.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 1666564940041 in words is "one trillion, six hundred sixty-six billion, five hundred sixty-four million, nine hundred forty thousand, forty-one".