1668667003356 has 24 divisors (see below), whose sum is σ = 4098480359680. Its totient is φ = 526947474672.

The previous prime is 1668667003313. The next prime is 1668667003357. The reversal of 1668667003356 is 6533007668661.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a junction number, because it is equal to n+sod(n) for n = 1668667003296 and 1668667003305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668667003357) 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, 3659357236 + ... + 3659357691.

Almost surely, 2^{1668667003356} is an apocalyptic number.

It is an amenable number.

1668667003356 is an abundant number, since it is smaller than the sum of its proper divisors (2429813356324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1668667003356 is a wasteful number, since it uses less digits than its factorization.

1668667003356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7318714953 (or 7318714951 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 57.

The spelling of 1668667003356 in words is "one trillion, six hundred sixty-eight billion, six hundred sixty-seven million, three thousand, three hundred fifty-six".