63221660 has 24 divisors (see below), whose sum is σ = 133113456. Its totient is φ = 25222400.

The previous prime is 63221659. The next prime is 63221677. The reversal of 63221660 is 6612236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4079 + ... + 11961.

It is an arithmetic number, because the mean of its divisors is an integer number (5546394).

Almost surely, 2^63221660 is an apocalyptic number.

It is an amenable number.

63221660 is an abundant number, since it is smaller than the sum of its proper divisors (69891796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63221660 is a wasteful number, since it uses less digits than its factorization.

63221660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8293 (or 8291 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 63221660 is about 7951.2049401333. The cubic root of 63221660 is about 398.3718400633.

Adding to 63221660 its reverse (6612236), we get a palindrome (69833896).

The spelling of 63221660 in words is "sixty-three million, two hundred twenty-one thousand, six hundred sixty".