63520066 has 32 divisors (see below), whose sum is σ = 102187008. Its totient is φ = 29549520.

The previous prime is 63520031. The next prime is 63520069. The reversal of 63520066 is 66002536.

63520066 = 785² + 786² + ... + 876².

63520066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63520069) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 484821 + ... + 484951.

It is an arithmetic number, because the mean of its divisors is an integer number (3193344).

Almost surely, 2^63520066 is an apocalyptic number.

63520066 is a deficient number, since it is larger than the sum of its proper divisors (38666942).

63520066 is a wasteful number, since it uses less digits than its factorization.

63520066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 63520066 is about 7969.9476786237. The cubic root of 63520066 is about 398.9976277227.

The spelling of 63520066 in words is "sixty-three million, five hundred twenty thousand, sixty-six".