1666700370020 has 48 divisors (see below), whose sum is σ = 4002172530048. Its totient is φ = 571141320960.

The previous prime is 1666700370011. The next prime is 1666700370043. The reversal of 1666700370020 is 200730076661.

It is a super-3 number, since 3×1666700370020³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2843786 + ... + 3379425.

It is an arithmetic number, because the mean of its divisors is an integer number (83378594376).

Almost surely, 2^{1666700370020} is an apocalyptic number.

1666700370020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1666700370020 is an abundant number, since it is smaller than the sum of its proper divisors (2335472160028).

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

1666700370020 is a wasteful number, since it uses less digits than its factorization.

1666700370020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6225140 (or 6225138 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 38.

The spelling of 1666700370020 in words is "one trillion, six hundred sixty-six billion, seven hundred million, three hundred seventy thousand, twenty".