63661574 has 8 divisors (see below), whose sum is σ = 95700000. Its totient is φ = 31761576.

The previous prime is 63661541. The next prime is 63661579. The reversal of 63661574 is 47516636.

It is a happy number.

63661574 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63661579) 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, 33449 + ... + 35300.

It is an arithmetic number, because the mean of its divisors is an integer number (11962500).

Almost surely, 2^63661574 is an apocalyptic number.

63661574 is a deficient number, since it is larger than the sum of its proper divisors (32038426).

63661574 is a wasteful number, since it uses less digits than its factorization.

63661574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69214.

The product of its digits is 90720, while the sum is 38.

The square root of 63661574 is about 7978.8203388722. The cubic root of 63661574 is about 399.2936994161.

The spelling of 63661574 in words is "sixty-three million, six hundred sixty-one thousand, five hundred seventy-four".