166665505202 has 24 divisors (see below), whose sum is σ = 292850894208. Its totient is φ = 69685915680.

The previous prime is 166665505159. The next prime is 166665505219. The reversal of 166665505202 is 202505566661.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3517418 + ... + 3564485.

It is an arithmetic number, because the mean of its divisors is an integer number (12202120592).

Almost surely, 2^166665505202 is an apocalyptic number.

166665505202 is a deficient number, since it is larger than the sum of its proper divisors (126185389006).

166665505202 is an equidigital number, since it uses as much as digits as its factorization.

166665505202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7081994 (or 7081953 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 166665505202 in words is "one hundred sixty-six billion, six hundred sixty-five million, five hundred five thousand, two hundred two".