1001666852586 has 16 divisors (see below), whose sum is σ = 2225926339200. Its totient is φ = 333888950844.

The previous prime is 1001666852573. The next prime is 1001666852587. The reversal of 1001666852586 is 6852586661001.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 18549386159 = 1001666852586 / (1 + 0 + 0 + 1 + 6 + 6 + 6 + 8 + 5 + 2 + 5 + 8 + 6).

It is not an unprimeable number, because it can be changed into a prime (1001666852587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9274693026 + ... + 9274693133.

It is an arithmetic number, because the mean of its divisors is an integer number (139120396200).

Almost surely, 2^{1001666852586} is an apocalyptic number.

1001666852586 is an abundant number, since it is smaller than the sum of its proper divisors (1224259486614).

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

1001666852586 is a wasteful number, since it uses less digits than its factorization.

1001666852586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18549386170 (or 18549386164 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 1001666852586 in words is "one trillion, one billion, six hundred sixty-six million, eight hundred fifty-two thousand, five hundred eighty-six".