166511232 has 48 divisors (see below), whose sum is σ = 479156730. Its totient is φ = 55503360.

The previous prime is 166511221. The next prime is 166511239. The reversal of 166511232 is 232115661.

166511232 is a `hidden beast` number, since 1 + 6 + 651 + 1 + 2 + 3 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 96353856 + 70157376 = 9816^2 + 8376^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 166511196 and 166511205.

It is not an unprimeable number, because it can be changed into a prime (166511239) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 71119 + ... + 73422.

Almost surely, 2^166511232 is an apocalyptic number.

166511232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166511232 is an abundant number, since it is smaller than the sum of its proper divisors (312645498).

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

166511232 is a wasteful number, since it uses less digits than its factorization.

166511232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144561 (or 144546 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 166511232 is about 12903.9231243835. The cubic root of 166511232 is about 550.1500769515.

Adding to 166511232 its reverse (232115661), we get a palindrome (398626893).

The spelling of 166511232 in words is "one hundred sixty-six million, five hundred eleven thousand, two hundred thirty-two".