66245552 has 40 divisors (see below), whose sum is σ = 135705600. Its totient is φ = 31240512.

The previous prime is 66245551. The next prime is 66245561. The reversal of 66245552 is 25554266.

It is not an unprimeable number, because it can be changed into a prime (66245551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108833 + ... + 109439.

It is an arithmetic number, because the mean of its divisors is an integer number (3392640).

Almost surely, 2^66245552 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 66245552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67852800).

66245552 is an abundant number, since it is smaller than the sum of its proper divisors (69460048).

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

66245552 is a wasteful number, since it uses less digits than its factorization.

66245552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 987 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The square root of 66245552 is about 8139.1370549954. The cubic root of 66245552 is about 404.6245608762.

The spelling of 66245552 in words is "sixty-six million, two hundred forty-five thousand, five hundred fifty-two".