166641552 has 360 divisors, whose sum is σ = 628486560. Its totient is φ = 40642560.

The previous prime is 166641551. The next prime is 166641581. The reversal of 166641552 is 255146661.

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

It is not an unprimeable number, because it can be changed into a prime (166641551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1474648 + ... + 1474760.

It is an arithmetic number, because the mean of its divisors is an integer number (1745796).

Almost surely, 2^166641552 is an apocalyptic number.

166641552 is a gapful number since it is divisible by the number (12) 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 166641552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314243280).

166641552 is an abundant number, since it is smaller than the sum of its proper divisors (461845008).

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

166641552 is a wasteful number, since it uses less digits than its factorization.

166641552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 155 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 166641552 is about 12908.9717638548. The cubic root of 166641552 is about 550.2935644931.

The spelling of 166641552 in words is "one hundred sixty-six million, six hundred forty-one thousand, five hundred fifty-two".