1668000512663 has 4 divisors (see below), whose sum is σ = 1668003172560. Its totient is φ = 1667997852768.

The previous prime is 1668000512641. The next prime is 1668000512707. The reversal of 1668000512663 is 3662150008661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1668000512663 - 2⁶ = 1668000512599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668000512603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188831 + ... + 1836207.

It is an arithmetic number, because the mean of its divisors is an integer number (417000793140).

Almost surely, 2^{1668000512663} is an apocalyptic number.

1668000512663 is a deficient number, since it is larger than the sum of its proper divisors (2659897).

1668000512663 is a wasteful number, since it uses less digits than its factorization.

1668000512663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659896.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 1668000512663 in words is "one trillion, six hundred sixty-eight billion, five hundred twelve thousand, six hundred sixty-three".