166539648 has 128 divisors (see below), whose sum is σ = 489110400. Its totient is φ = 49786880.

The previous prime is 166539643. The next prime is 166539673. The reversal of 166539648 is 846935661.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 166539597 and 166539606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166539643) 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, 375715 + ... + 376157.

It is an arithmetic number, because the mean of its divisors is an integer number (3821175).

Almost surely, 2^166539648 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 166539648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244555200).

166539648 is an abundant number, since it is smaller than the sum of its proper divisors (322570752).

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

166539648 is a wasteful number, since it uses less digits than its factorization.

166539648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 548 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The square root of 166539648 is about 12905.0241379085. The cubic root of 166539648 is about 550.1813704869.

The spelling of 166539648 in words is "one hundred sixty-six million, five hundred thirty-nine thousand, six hundred forty-eight".