66266532 has 48 divisors (see below), whose sum is σ = 172529280. Its totient is φ = 21995424.

The previous prime is 66266513. The next prime is 66266533. The reversal of 66266532 is 23566266.

66266532 is a `hidden beast` number, since 6 + 62 + 66 + 532 = 666.

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 (66266533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27238 + ... + 29570.

It is an arithmetic number, because the mean of its divisors is an integer number (3594360).

Almost surely, 2^66266532 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 66266532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86264640).

66266532 is an abundant number, since it is smaller than the sum of its proper divisors (106262748).

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

66266532 is a wasteful number, since it uses less digits than its factorization.

66266532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609 (or 2601 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 66266532 is about 8140.4257873897. The cubic root of 66266532 is about 404.6672713024.

The spelling of 66266532 in words is "sixty-six million, two hundred sixty-six thousand, five hundred thirty-two".