166540132 has 24 divisors (see below), whose sum is σ = 319001760. Its totient is φ = 75447360.

The previous prime is 166540103. The next prime is 166540141. The reversal of 166540132 is 231045661.

It is a self number, because there is not a number n which added to its sum of digits gives 166540132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7344 + ... + 19672.

It is an arithmetic number, because the mean of its divisors is an integer number (13291740).

Almost surely, 2^166540132 is an apocalyptic number.

It is an amenable number.

166540132 is a deficient number, since it is larger than the sum of its proper divisors (152461628).

166540132 is a wasteful number, since it uses less digits than its factorization.

166540132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12651 (or 12649 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 166540132 is about 12905.0428902813. The cubic root of 166540132 is about 550.1819034681.

Adding to 166540132 its reverse (231045661), we get a palindrome (397585793).

The spelling of 166540132 in words is "one hundred sixty-six million, five hundred forty thousand, one hundred thirty-two".