63661442 has 16 divisors (see below), whose sum is σ = 103534200. Its totient is φ = 29183232.

The previous prime is 63661421. The next prime is 63661463. The reversal of 63661442 is 24416636.

63661442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (63661421) and next prime (63661463).

It can be written as a sum of positive squares in 4 ways, for example, as 50708641 + 12952801 = 7121^2 + 3599^2 .

It is a junction number, because it is equal to n+sod(n) for n = 63661399 and 63661408.

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 in 7 ways as a sum of consecutive naturals, for example, 4343 + ... + 12090.

Almost surely, 2^63661442 is an apocalyptic number.

63661442 is a deficient number, since it is larger than the sum of its proper divisors (39872758).

63661442 is a wasteful number, since it uses less digits than its factorization.

63661442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16597.

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

The square root of 63661442 is about 7978.8120669684. The cubic root of 63661442 is about 399.2934234422.

The spelling of 63661442 in words is "sixty-three million, six hundred sixty-one thousand, four hundred forty-two".