166820716608 has 336 divisors, whose sum is σ = 553759030656. Its totient is φ = 43389665280.

The previous prime is 166820716597. The next prime is 166820716631. The reversal of 166820716608 is 806617028661.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16575898 + ... + 16585958.

Almost surely, 2^166820716608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166820716608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276879515328).

166820716608 is an abundant number, since it is smaller than the sum of its proper divisors (386938314048).

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

166820716608 is a wasteful number, since it uses less digits than its factorization.

166820716608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10182 (or 10159 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 166820716608 in words is "one hundred sixty-six billion, eight hundred twenty million, seven hundred sixteen thousand, six hundred eight".