1666734877133 has 8 divisors (see below), whose sum is σ = 1682954465088. Its totient is φ = 1650516014304.

The previous prime is 1666734877117. The next prime is 1666734877151. The reversal of 1666734877133 is 3317784376661.

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 1666734877133 - 2⁴ = 1666734877117 is a prime.

It is a super-3 number, since 3×1666734877133³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666734877103) 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, 5215985 + ... + 5526297.

It is an arithmetic number, because the mean of its divisors is an integer number (210369308136).

Almost surely, 2^{1666734877133} is an apocalyptic number.

It is an amenable number.

1666734877133 is a deficient number, since it is larger than the sum of its proper divisors (16219587955).

1666734877133 is a wasteful number, since it uses less digits than its factorization.

1666734877133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362563.

The product of its digits is 64012032, while the sum is 62.

The spelling of 1666734877133 in words is "one trillion, six hundred sixty-six billion, seven hundred thirty-four million, eight hundred seventy-seven thousand, one hundred thirty-three".