166703847809 has 16 divisors (see below), whose sum is σ = 174541398912. Its totient is φ = 158915906688.

The previous prime is 166703847797. The next prime is 166703847811. The reversal of 166703847809 is 908748307661.

It is a cyclic number.

It is not a de Polignac number, because 166703847809 - 2²⁴ = 166687070593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166703847899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21010007 + ... + 21017939.

It is an arithmetic number, because the mean of its divisors is an integer number (10908837432).

Almost surely, 2^166703847809 is an apocalyptic number.

It is an amenable number.

166703847809 is a deficient number, since it is larger than the sum of its proper divisors (7837551103).

166703847809 is a wasteful number, since it uses less digits than its factorization.

166703847809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10936.

The product of its (nonzero) digits is 12192768, while the sum is 59.

The spelling of 166703847809 in words is "one hundred sixty-six billion, seven hundred three million, eight hundred forty-seven thousand, eight hundred nine".