63661078 has 16 divisors (see below), whose sum is σ = 103180896. Its totient is φ = 29283840.

The previous prime is 63661057. The next prime is 63661097. The reversal of 63661078 is 87016636.

63661078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 4150 + ... + 12022.

It is an arithmetic number, because the mean of its divisors is an integer number (6448806).

Almost surely, 2^63661078 is an apocalyptic number.

63661078 is a deficient number, since it is larger than the sum of its proper divisors (39519818).

63661078 is a wasteful number, since it uses less digits than its factorization.

63661078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8199.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 63661078 is about 7978.7892565226. The cubic root of 63661078 is about 399.2926624212.

The spelling of 63661078 in words is "sixty-three million, six hundred sixty-one thousand, seventy-eight".