1666868370036 has 24 divisors (see below), whose sum is σ = 3889443927264. Its totient is φ = 555610733280.

The previous prime is 1666868370031. The next prime is 1666868370049. The reversal of 1666868370036 is 6300738686661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666868370031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 921955 + ... + 2045418.

It is an arithmetic number, because the mean of its divisors is an integer number (162060163636).

Almost surely, 2^{1666868370036} is an apocalyptic number.

It is an amenable number.

1666868370036 is an abundant number, since it is smaller than the sum of its proper divisors (2222575557228).

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

1666868370036 is a wasteful number, since it uses less digits than its factorization.

1666868370036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014191 (or 3014189 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 60.

The spelling of 1666868370036 in words is "one trillion, six hundred sixty-six billion, eight hundred sixty-eight million, three hundred seventy thousand, thirty-six".