166063115520 has 720 divisors, whose sum is σ = 638499552768. Its totient is φ = 41060597760.

The previous prime is 166063115501. The next prime is 166063115573. The reversal of 166063115520 is 25511360661.

166063115520 is a `hidden beast` number, since 1 + 6 + 6 + 0 + 631 + 15 + 5 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 125141097 + ... + 125142423.

Almost surely, 2^166063115520 is an apocalyptic number.

166063115520 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 166063115520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319249776384).

166063115520 is an abundant number, since it is smaller than the sum of its proper divisors (472436437248).

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

166063115520 is a wasteful number, since it uses less digits than its factorization.

166063115520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448 (or 1425 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 166063115520 in words is "one hundred sixty-six billion, sixty-three million, one hundred fifteen thousand, five hundred twenty".