66155232 has 192 divisors, whose sum is σ = 209986560. Its totient is φ = 17971200.

The previous prime is 66155191. The next prime is 66155237. The reversal of 66155232 is 23255166.

It is a self number, because there is not a number n which added to its sum of digits gives 66155232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66155237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 837369 + ... + 837447.

It is an arithmetic number, because the mean of its divisors is an integer number (1093680).

Almost surely, 2^66155232 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 66155232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104993280).

66155232 is an abundant number, since it is smaller than the sum of its proper divisors (143831328).

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

66155232 is a wasteful number, since it uses less digits than its factorization.

66155232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 169 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 66155232 is about 8133.5866627214. The cubic root of 66155232 is about 404.4405872067.

The spelling of 66155232 in words is "sixty-six million, one hundred fifty-five thousand, two hundred thirty-two".