66435500 has 96 divisors (see below), whose sum is σ = 155675520. Its totient is φ = 24710400.

The previous prime is 66435493. The next prime is 66435503. The reversal of 66435500 is 553466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66435503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 609446 + ... + 609554.

It is an arithmetic number, because the mean of its divisors is an integer number (1621620).

Almost surely, 2^66435500 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 66435500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77837760).

66435500 is an abundant number, since it is smaller than the sum of its proper divisors (89240020).

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

66435500 is a wasteful number, since it uses less digits than its factorization.

66435500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 66435500 is about 8150.7975069928. The cubic root of 66435500 is about 405.0109228370.

Adding to 66435500 its reverse (553466), we get a palindrome (66988966).

The spelling of 66435500 in words is "sixty-six million, four hundred thirty-five thousand, five hundred".