63661402 has 32 divisors (see below), whose sum is σ = 111589632. Its totient is φ = 26676864.

The previous prime is 63661399. The next prime is 63661421. The reversal of 63661402 is 20416636.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170488 + ... + 170860.

It is an arithmetic number, because the mean of its divisors is an integer number (3487176).

Almost surely, 2^63661402 is an apocalyptic number.

63661402 is a deficient number, since it is larger than the sum of its proper divisors (47928230).

63661402 is a wasteful number, since it uses less digits than its factorization.

63661402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 63661402 is about 7978.8095603292. The cubic root of 63661402 is about 399.2933398136.

The spelling of 63661402 in words is "sixty-three million, six hundred sixty-one thousand, four hundred two".