63661425 has 24 divisors (see below), whose sum is σ = 105734304. Its totient is φ = 33797760.

The previous prime is 63661421. The next prime is 63661463. The reversal of 63661425 is 52416636.

It is not a de Polignac number, because 63661425 - 2² = 63661421 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 15654 + ... + 19296.

It is an arithmetic number, because the mean of its divisors is an integer number (4405596).

Almost surely, 2^63661425 is an apocalyptic number.

It is an amenable number.

63661425 is a deficient number, since it is larger than the sum of its proper divisors (42072879).

63661425 is a wasteful number, since it uses less digits than its factorization.

63661425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3889 (or 3884 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 63661425 is about 7978.8110016468. The cubic root of 63661425 is about 399.2933879000.

The spelling of 63661425 in words is "sixty-three million, six hundred sixty-one thousand, four hundred twenty-five".