1668501670201 has 16 divisors (see below), whose sum is σ = 1796138530560. Its totient is φ = 1545207103440.

The previous prime is 1668501670181. The next prime is 1668501670211. The reversal of 1668501670201 is 1020761058661.

It is a cyclic number.

It is not a de Polignac number, because 1668501670201 - 2⁵ = 1668501670169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668501670211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4835851 + ... + 5169376.

It is an arithmetic number, because the mean of its divisors is an integer number (112258658160).

Almost surely, 2^{1668501670201} is an apocalyptic number.

It is an amenable number.

1668501670201 is a deficient number, since it is larger than the sum of its proper divisors (127636860359).

1668501670201 is a wasteful number, since it uses less digits than its factorization.

1668501670201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10005444.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 1668501670201 in words is "one trillion, six hundred sixty-eight billion, five hundred one million, six hundred seventy thousand, two hundred one".