166323564 has 96 divisors (see below), whose sum is σ = 473518080. Its totient is φ = 50068800.

The previous prime is 166323559. The next prime is 166323569. The reversal of 166323564 is 465323661.

166323564 is a `hidden beast` number, since 1 + 66 + 32 + 3 + 564 = 666.

It is an interprime number because it is at equal distance from previous prime (166323559) and next prime (166323569).

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 (166323569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226542 + ... + 227274.

It is an arithmetic number, because the mean of its divisors is an integer number (4932480).

Almost surely, 2^166323564 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 166323564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236759040).

166323564 is an abundant number, since it is smaller than the sum of its proper divisors (307194516).

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

166323564 is a wasteful number, since it uses less digits than its factorization.

166323564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948 (or 940 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 166323564 is about 12896.6493322878. The cubic root of 166323564 is about 549.9433153702.

The spelling of 166323564 in words is "one hundred sixty-six million, three hundred twenty-three thousand, five hundred sixty-four".