66655152 has 60 divisors (see below), whose sum is σ = 188429904. Its totient is φ = 21993600.

The previous prime is 66655133. The next prime is 66655157. The reversal of 66655152 is 25155666.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66655157) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12253 + ... + 16835.

Almost surely, 2^66655152 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 66655152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94214952).

66655152 is an abundant number, since it is smaller than the sum of its proper divisors (121774752).

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

66655152 is a wasteful number, since it uses less digits than its factorization.

66655152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4698 (or 4689 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 66655152 is about 8164.2606523800. The cubic root of 66655152 is about 405.4567868512.

The spelling of 66655152 in words is "sixty-six million, six hundred fifty-five thousand, one hundred fifty-two".