1666868367020 has 48 divisors (see below), whose sum is σ = 3509526921600. Its totient is φ = 665013888000.

The previous prime is 1666868367001. The next prime is 1666868367023. The reversal of 1666868367020 is 207638686661.

It is not an unprimeable number, because it can be changed into a prime (1666868367023) 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 15 ways as a sum of consecutive naturals, for example, 73616861 + ... + 73639499.

It is an arithmetic number, because the mean of its divisors is an integer number (73115144200).

Almost surely, 2^{1666868367020} is an apocalyptic number.

1666868367020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666868367020 is an abundant number, since it is smaller than the sum of its proper divisors (1842658554580).

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

1666868367020 is a wasteful number, since it uses less digits than its factorization.

1666868367020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32058 (or 32056 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 59.

The spelling of 1666868367020 in words is "one trillion, six hundred sixty-six billion, eight hundred sixty-eight million, three hundred sixty-seven thousand, twenty".