166522335420 has 192 divisors, whose sum is σ = 571069126656. Its totient is φ = 35423308800.

The previous prime is 166522335403. The next prime is 166522335431. The reversal of 166522335420 is 24533225661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 124470 + ... + 590370.

It is an arithmetic number, because the mean of its divisors is an integer number (2974318368).

Almost surely, 2^166522335420 is an apocalyptic number.

166522335420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166522335420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285534563328).

166522335420 is an abundant number, since it is smaller than the sum of its proper divisors (404546791236).

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

166522335420 is a wasteful number, since it uses less digits than its factorization.

166522335420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465980 (or 465978 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

The spelling of 166522335420 in words is "one hundred sixty-six billion, five hundred twenty-two million, three hundred thirty-five thousand, four hundred twenty".