66155152 has 40 divisors (see below), whose sum is σ = 147857600. Its totient is φ = 28086912.

The previous prime is 66155137. The next prime is 66155191. The reversal of 66155152 is 25155166.

66155152 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66155152² = 8753008272286208, which contains 22 as substring.

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, 9499 + ... + 14917.

It is an arithmetic number, because the mean of its divisors is an integer number (3696440).

Almost surely, 2^66155152 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 66155152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73928800).

66155152 is an abundant number, since it is smaller than the sum of its proper divisors (81702448).

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

66155152 is a wasteful number, since it uses less digits than its factorization.

66155152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5543 (or 5537 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

The square root of 66155152 is about 8133.5817448403. The cubic root of 66155152 is about 404.4404241797.

The spelling of 66155152 in words is "sixty-six million, one hundred fifty-five thousand, one hundred fifty-two".