1668686676695 has 8 divisors (see below), whose sum is σ = 2003027353440. Its totient is φ = 1334547113760.

The previous prime is 1668686676689. The next prime is 1668686676731. The reversal of 1668686676695 is 5966766868661.

It is a happy number.

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

It is not a de Polignac number, because 1668686676695 - 2¹² = 1668686672599 is a prime.

It is a super-2 number, since 2×1668686676695² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50260196 + ... + 50293385.

It is an arithmetic number, because the mean of its divisors is an integer number (250378419180).

Almost surely, 2^{1668686676695} is an apocalyptic number.

1668686676695 is a deficient number, since it is larger than the sum of its proper divisors (334340676745).

1668686676695 is a wasteful number, since it uses less digits than its factorization.

1668686676695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100556905.

The product of its digits is 5643509760, while the sum is 80.

The spelling of 1668686676695 in words is "one trillion, six hundred sixty-eight billion, six hundred eighty-six million, six hundred seventy-six thousand, six hundred ninety-five".