66088530 has 48 divisors (see below), whose sum is σ = 172822104. Its totient is φ = 17521920.

The previous prime is 66088511. The next prime is 66088531. The reversal of 66088530 is 3588066.

It can be written as a sum of positive squares in 4 ways, for example, as 32251041 + 33837489 = 5679^2 + 5817^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66088531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14262 + ... + 18318.

Almost surely, 2^66088530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66088530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86411052).

66088530 is an abundant number, since it is smaller than the sum of its proper divisors (106733574).

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

66088530 is a wasteful number, since it uses less digits than its factorization.

66088530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4251 (or 4248 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 66088530 is about 8129.4852235551. The cubic root of 66088530 is about 404.3046137446.

The spelling of 66088530 in words is "sixty-six million, eighty-eight thousand, five hundred thirty".