166332661 has 16 divisors (see below), whose sum is σ = 188619840. Its totient is φ = 145290880.

The previous prime is 166332601. The next prime is 166332679. The reversal of 166332661 is 166233661.

166332661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 166332661 - 2⁷ = 166332533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166332601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71265 + ... + 73561.

It is an arithmetic number, because the mean of its divisors is an integer number (11788740).

Almost surely, 2^166332661 is an apocalyptic number.

166332661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166332661 is a deficient number, since it is larger than the sum of its proper divisors (22287179).

166332661 is a wasteful number, since it uses less digits than its factorization.

166332661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564.

The product of its digits is 23328, while the sum is 34.

The square root of 166332661 is about 12897.0020159725. The cubic root of 166332661 is about 549.9533414964.

The spelling of 166332661 in words is "one hundred sixty-six million, three hundred thirty-two thousand, six hundred sixty-one".