166705209896 has 64 divisors (see below), whose sum is σ = 326412533760. Its totient is φ = 79729272000.

The previous prime is 166705209851. The next prime is 166705209901. The reversal of 166705209896 is 698902507661.

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, 8525651 + ... + 8545181.

It is an arithmetic number, because the mean of its divisors is an integer number (5100195840).

Almost surely, 2^166705209896 is an apocalyptic number.

It is an amenable number.

166705209896 is a deficient number, since it is larger than the sum of its proper divisors (159707323864).

166705209896 is a wasteful number, since it uses less digits than its factorization.

166705209896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19966 (or 19962 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 166705209896 in words is "one hundred sixty-six billion, seven hundred five million, two hundred nine thousand, eight hundred ninety-six".