1666666668335 has 4 divisors (see below), whose sum is σ = 2000000002008. Its totient is φ = 1333333334664.

The previous prime is 1666666668319. The next prime is 1666666668431. The reversal of 1666666668335 is 5338666666661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1666666668335 - 2⁴ = 1666666668319 is a prime.

It is a super-4 number, since 4×1666666668335⁴ (a number of 50 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166666666829 + ... + 166666666838.

It is an arithmetic number, because the mean of its divisors is an integer number (500000000502).

Almost surely, 2^{1666666668335} is an apocalyptic number.

1666666668335 is a deficient number, since it is larger than the sum of its proper divisors (333333333673).

1666666668335 is an equidigital number, since it uses as much as digits as its factorization.

1666666668335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333333333672.

The product of its digits is 604661760, while the sum is 68.

The spelling of 1666666668335 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-eight thousand, three hundred thirty-five".