63661424 has 20 divisors (see below), whose sum is σ = 128707536. Its totient is φ = 30446592.

The previous prime is 63661421. The next prime is 63661463. The reversal of 63661424 is 42416636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63661421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86129 + ... + 86864.

Almost surely, 2^63661424 is an apocalyptic number.

It is an amenable number.

63661424 is an abundant number, since it is smaller than the sum of its proper divisors (65046112).

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

63661424 is a wasteful number, since it uses less digits than its factorization.

63661424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173024 (or 173018 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 63661424 is about 7978.8109389808. The cubic root of 63661424 is about 399.2933858093.

The spelling of 63661424 in words is "sixty-three million, six hundred sixty-one thousand, four hundred twenty-four".