61666448 has 10 divisors (see below), whose sum is σ = 119478774. Its totient is φ = 30833216.

The previous prime is 61666439. The next prime is 61666453. The reversal of 61666448 is 84466616.

61666448 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., 61653904 + 12544 = 7852^2 + 112^2 .

It is an unprimeable number.

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, 1927061 + ... + 1927092.

Almost surely, 2^61666448 is an apocalyptic number.

It is an amenable number.

61666448 is a deficient number, since it is larger than the sum of its proper divisors (57812326).

61666448 is a wasteful number, since it uses less digits than its factorization.

61666448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854161 (or 3854155 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 61666448 is about 7852.7987367562. The cubic root of 61666448 is about 395.0781194635.

The spelling of 61666448 in words is "sixty-one million, six hundred sixty-six thousand, four hundred forty-eight".