166685020002 has 24 divisors (see below), whose sum is σ = 369549735984. Its totient is φ = 54269541144.

The previous prime is 166685020001. The next prime is 166685020027. The reversal of 166685020002 is 200020586661.

It is not an unprimeable number, because it can be changed into a prime (166685020001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107676888 + ... + 107678435.

It is an arithmetic number, because the mean of its divisors is an integer number (15397905666).

Almost surely, 2^166685020002 is an apocalyptic number.

166685020002 is an abundant number, since it is smaller than the sum of its proper divisors (202864715982).

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

166685020002 is a wasteful number, since it uses less digits than its factorization.

166685020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215355374 (or 215355371 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 166685020002 in words is "one hundred sixty-six billion, six hundred eighty-five million, twenty thousand, two".