1666253752117 has 8 divisors (see below), whose sum is σ = 1667176308000. Its totient is φ = 1665331323024.

The previous prime is 1666253752109. The next prime is 1666253752123. The reversal of 1666253752117 is 7112573526661.

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 1666253752117 - 2³ = 1666253752109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666253752517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38992759 + ... + 39035467.

It is an arithmetic number, because the mean of its divisors is an integer number (208397038500).

Almost surely, 2^{1666253752117} is an apocalyptic number.

It is an amenable number.

1666253752117 is a deficient number, since it is larger than the sum of its proper divisors (922555883).

1666253752117 is a wasteful number, since it uses less digits than its factorization.

1666253752117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63395.

The product of its digits is 3175200, while the sum is 52.

The spelling of 1666253752117 in words is "one trillion, six hundred sixty-six billion, two hundred fifty-three million, seven hundred fifty-two thousand, one hundred seventeen".