66724450 has 24 divisors (see below), whose sum is σ = 133655508. Its totient is φ = 24636480.

The previous prime is 66724421. The next prime is 66724453. The reversal of 66724450 is 5442766.

66724450 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 6 ways, for example, as 15358561 + 51365889 = 3919^2 + 7167^2 .

It is not an unprimeable number, because it can be changed into a prime (66724453) 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 11 ways as a sum of consecutive naturals, for example, 50677 + ... + 51976.

Almost surely, 2^66724450 is an apocalyptic number.

66724450 is an abundant number, since it is smaller than the sum of its proper divisors (66931058).

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

66724450 is a wasteful number, since it uses less digits than its factorization.

66724450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102678 (or 102673 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 66724450 is about 8168.5035349200. The cubic root of 66724450 is about 405.5972491764.

The spelling of 66724450 in words is "sixty-six million, seven hundred twenty-four thousand, four hundred fifty".