63554218666 has 16 divisors (see below), whose sum is σ = 99010268928. Its totient is φ = 30563373600.

The previous prime is 63554218661. The next prime is 63554218669. The reversal of 63554218666 is 66681245536.

It is not an unprimeable number, because it can be changed into a prime (63554218661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3134275 + ... + 3154486.

It is an arithmetic number, because the mean of its divisors is an integer number (6188141808).

Almost surely, 2^63554218666 is an apocalyptic number.

63554218666 is a deficient number, since it is larger than the sum of its proper divisors (35456050262).

63554218666 is a wasteful number, since it uses less digits than its factorization.

63554218666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6288957.

The product of its digits is 6220800, while the sum is 52.

The spelling of 63554218666 in words is "sixty-three billion, five hundred fifty-four million, two hundred eighteen thousand, six hundred sixty-six".