66255504 has 80 divisors (see below), whose sum is σ = 196570752. Its totient is φ = 18837504.

The previous prime is 66255503. The next prime is 66255533. The reversal of 66255504 is 40555266.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66255503) 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, 98112 + ... + 98784.

Almost surely, 2^66255504 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 66255504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98285376).

66255504 is an abundant number, since it is smaller than the sum of its proper divisors (130315248).

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

66255504 is a wasteful number, since it uses less digits than its factorization.

66255504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984 (or 978 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 66255504 is about 8139.7483990600. The cubic root of 66255504 is about 404.6448219699.

The spelling of 66255504 in words is "sixty-six million, two hundred fifty-five thousand, five hundred four".