166316544 has 160 divisors (see below), whose sum is σ = 503807040. Its totient is φ = 54153216.

The previous prime is 166316539. The next prime is 166316551. The reversal of 166316544 is 445613661.

It is a happy number.

166316544 is a `hidden beast` number, since 16 + 631 + 6 + 5 + 4 + 4 = 666.

It is a super-2 number, since 2×166316544² = 55322385616207872, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 166316499 and 166316508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 732559 + ... + 732785.

It is an arithmetic number, because the mean of its divisors is an integer number (3148794).

Almost surely, 2^166316544 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 166316544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251903520).

166316544 is an abundant number, since it is smaller than the sum of its proper divisors (337490496).

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

166316544 is an equidigital number, since it uses as much as digits as its factorization.

166316544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 285 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 166316544 is about 12896.3771657005. The cubic root of 166316544 is about 549.9355781294.

The spelling of 166316544 in words is "one hundred sixty-six million, three hundred sixteen thousand, five hundred forty-four".