1666870335042 has 32 divisors (see below), whose sum is σ = 3636973992960. Its totient is φ = 505089168720.

The previous prime is 1666870335037. The next prime is 1666870335059. The reversal of 1666870335042 is 2405330786661.

It is an unprimeable number.

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, 909459 + ... + 2039817.

It is an arithmetic number, because the mean of its divisors is an integer number (113655437280).

Almost surely, 2^{1666870335042} is an apocalyptic number.

1666870335042 is an abundant number, since it is smaller than the sum of its proper divisors (1970103657918).

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

1666870335042 is a wasteful number, since it uses less digits than its factorization.

1666870335042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152718.

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 1666870335042 in words is "one trillion, six hundred sixty-six billion, eight hundred seventy million, three hundred thirty-five thousand, forty-two".