166565652 has 24 divisors (see below), whose sum is σ = 423985632. Its totient is φ = 50474400.

The previous prime is 166565629. The next prime is 166565653. The reversal of 166565652 is 256565661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166565653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630799 + ... + 631062.

It is an arithmetic number, because the mean of its divisors is an integer number (17666068).

Almost surely, 2^166565652 is an apocalyptic number.

166565652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

166565652 is an abundant number, since it is smaller than the sum of its proper divisors (257419980).

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

166565652 is a wasteful number, since it uses less digits than its factorization.

166565652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261879 (or 1261877 counting only the distinct ones).

The product of its digits is 324000, while the sum is 42.

The square root of 166565652 is about 12906.0316131644. The cubic root of 166565652 is about 550.2100046529.

Subtracting 166565652 from its reverse (256565661), we obtain a palindrome (90000009).

The spelling of 166565652 in words is "one hundred sixty-six million, five hundred sixty-five thousand, six hundred fifty-two".