166039247520 has 384 divisors, whose sum is σ = 623771124480. Its totient is φ = 41100410880.

The previous prime is 166039247489. The next prime is 166039247567. The reversal of 166039247520 is 25742930661.

166039247520 is a `hidden beast` number, since 16 + 60 + 3 + 92 + 475 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 5345635 + ... + 5376605.

It is an arithmetic number, because the mean of its divisors is an integer number (1624403970).

Almost surely, 2^166039247520 is an apocalyptic number.

166039247520 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 166039247520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311885562240).

166039247520 is an abundant number, since it is smaller than the sum of its proper divisors (457731876960).

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

166039247520 is a wasteful number, since it uses less digits than its factorization.

166039247520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31085 (or 31071 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 166039247520 in words is "one hundred sixty-six billion, thirty-nine million, two hundred forty-seven thousand, five hundred twenty".