66235500 has 144 divisors (see below), whose sum is σ = 214643520. Its totient is φ = 17184000.

The previous prime is 66235493. The next prime is 66235511. The reversal of 66235500 is 553266.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184321 + ... + 184679.

It is an arithmetic number, because the mean of its divisors is an integer number (1490580).

Almost surely, 2^66235500 is an apocalyptic number.

66235500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66235500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107321760).

66235500 is an abundant number, since it is smaller than the sum of its proper divisors (148408020).

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

66235500 is a wasteful number, since it uses less digits than its factorization.

66235500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 66235500 is about 8138.5195213872. The cubic root of 66235500 is about 404.6040941344.

Adding to 66235500 its reverse (553266), we get a palindrome (66788766).

The spelling of 66235500 in words is "sixty-six million, two hundred thirty-five thousand, five hundred".