652172166 has 12 divisors (see below), whose sum is σ = 1413039732. Its totient is φ = 217390716.

The previous prime is 652172161. The next prime is 652172201. The reversal of 652172166 is 661271256.

It is a happy number.

652172166 is a `hidden beast` number, since 6 + 521 + 72 + 1 + 66 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 652172166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (652172161) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18115876 + ... + 18115911.

It is an arithmetic number, because the mean of its divisors is an integer number (117753311).

Almost surely, 2^652172166 is an apocalyptic number.

652172166 is an abundant number, since it is smaller than the sum of its proper divisors (760867566).

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

652172166 is a wasteful number, since it uses less digits than its factorization.

652172166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36231795 (or 36231792 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 652172166 is about 25537.6617175496. The cubic root of 652172166 is about 867.2029633025.

It can be divided in two parts, 6521 and 72166, that added together give a palindrome (78687).

The spelling of 652172166 in words is "six hundred fifty-two million, one hundred seventy-two thousand, one hundred sixty-six".