66727552 has 16 divisors (see below), whose sum is σ = 132934050. Its totient is φ = 33363712.

The previous prime is 66727543. The next prime is 66727553. The reversal of 66727552 is 25572766.

66727552 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33825856 + 32901696 = 5816^2 + 5736^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (66727553) 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 as a sum of consecutive naturals, namely, 260527 + ... + 260782.

Almost surely, 2^66727552 is an apocalyptic number.

It is an amenable number.

66727552 is a deficient number, since it is larger than the sum of its proper divisors (66206498).

66727552 is an equidigital number, since it uses as much as digits as its factorization.

66727552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521323 (or 521311 counting only the distinct ones).

The product of its digits is 176400, while the sum is 40.

The square root of 66727552 is about 8168.6934083732. The cubic root of 66727552 is about 405.6035344445.

The spelling of 66727552 in words is "sixty-six million, seven hundred twenty-seven thousand, five hundred fifty-two".