66611052 has 24 divisors (see below), whose sum is σ = 172695600. Its totient is φ = 22203648.

The previous prime is 66611047. The next prime is 66611053. The reversal of 66611052 is 25011666.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (66611053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308277 + ... + 308492.

It is an arithmetic number, because the mean of its divisors is an integer number (7195650).

Almost surely, 2^66611052 is an apocalyptic number.

It is an amenable number.

66611052 is an abundant number, since it is smaller than the sum of its proper divisors (106084548).

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

66611052 is a wasteful number, since it uses less digits than its factorization.

66611052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616782 (or 616774 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 66611052 is about 8161.5594098187. The cubic root of 66611052 is about 405.3673484578.

The spelling of 66611052 in words is "sixty-six million, six hundred eleven thousand, fifty-two".