63662221 has 24 divisors (see below), whose sum is σ = 77811840. Its totient is φ = 51861600.

The previous prime is 63662177. The next prime is 63662233. The reversal of 63662221 is 12226636.

It is a happy number.

It is not a de Polignac number, because 63662221 - 2⁹ = 63661709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63662221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63662021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100576 + ... + 101206.

It is an arithmetic number, because the mean of its divisors is an integer number (3242160).

Almost surely, 2^63662221 is an apocalyptic number.

It is an amenable number.

63662221 is a deficient number, since it is larger than the sum of its proper divisors (14149619).

63662221 is a wasteful number, since it uses less digits than its factorization.

63662221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 738 counting only the distinct ones).

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

The square root of 63662221 is about 7978.8608836099. The cubic root of 63662221 is about 399.2950521010.

Adding to 63662221 its reverse (12226636), we get a palindrome (75888857).

The spelling of 63662221 in words is "sixty-three million, six hundred sixty-two thousand, two hundred twenty-one".