166611020 has 24 divisors (see below), whose sum is σ = 350424144. Its totient is φ = 66541376.

The previous prime is 166611017. The next prime is 166611031. The reversal of 166611020 is 20116661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7562 + ... + 19758.

It is an arithmetic number, because the mean of its divisors is an integer number (14601006).

Almost surely, 2^166611020 is an apocalyptic number.

166611020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166611020 is an abundant number, since it is smaller than the sum of its proper divisors (183813124).

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

166611020 is a wasteful number, since it uses less digits than its factorization.

166611020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12889 (or 12887 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 166611020 is about 12907.7891213019. The cubic root of 166611020 is about 550.2599542498.

Adding to 166611020 its reverse (20116661), we get a palindrome (186727681).

The spelling of 166611020 in words is "one hundred sixty-six million, six hundred eleven thousand, twenty".