1666666835001 has 48 divisors (see below), whose sum is σ = 2793886950400. Its totient is φ = 937662653664.

The previous prime is 1666666834997. The next prime is 1666666835023. The reversal of 1666666835001 is 1005386666661.

It is not a de Polignac number, because 1666666835001 - 2² = 1666666834997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1666666835101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7826190 + ... + 8036328.

Almost surely, 2^{1666666835001} is an apocalyptic number.

It is an amenable number.

1666666835001 is a deficient number, since it is larger than the sum of its proper divisors (1127220115399).

1666666835001 is a wasteful number, since it uses less digits than its factorization.

1666666835001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212098 (or 212095 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 1666666835001 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-six million, eight hundred thirty-five thousand, one".