66015552 has 28 divisors (see below), whose sum is σ = 174666656. Its totient is φ = 22005120.

The previous prime is 66015541. The next prime is 66015553. The reversal of 66015552 is 25551066.

66015552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66015553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171724 + ... + 172107.

Almost surely, 2^66015552 is an apocalyptic number.

It is an amenable number.

66015552 is an abundant number, since it is smaller than the sum of its proper divisors (108651104).

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

66015552 is a wasteful number, since it uses less digits than its factorization.

66015552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343846 (or 343836 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 66015552 is about 8124.9955076911. The cubic root of 66015552 is about 404.1557416728.

The spelling of 66015552 in words is "sixty-six million, fifteen thousand, five hundred fifty-two".