66115452 has 48 divisors (see below), whose sum is σ = 170204832. Its totient is φ = 19845120.

The previous prime is 66115403. The next prime is 66115453. The reversal of 66115452 is 25451166.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66115453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1228 + ... + 11564.

It is an arithmetic number, because the mean of its divisors is an integer number (3545934).

Almost surely, 2^66115452 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66115452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85102416).

66115452 is an abundant number, since it is smaller than the sum of its proper divisors (104089380).

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

66115452 is a wasteful number, since it uses less digits than its factorization.

66115452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10398 (or 10396 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 66115452 is about 8131.1408793600. The cubic root of 66115452 is about 404.3595058272.

The spelling of 66115452 in words is "sixty-six million, one hundred fifteen thousand, four hundred fifty-two".