664022200 has 48 divisors (see below), whose sum is σ = 1547925480. Its totient is φ = 264908160.

The previous prime is 664022197. The next prime is 664022207. The reversal of 664022200 is 2220466.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664022207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75219 + ... + 83581.

Almost surely, 2^664022200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664022200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (773962740).

664022200 is an abundant number, since it is smaller than the sum of its proper divisors (883903280).

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

664022200 is a wasteful number, since it uses less digits than its factorization.

664022200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8776 (or 8767 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 664022200 is about 25768.6282133916. The cubic root of 664022200 is about 872.4238568703.

Adding to 664022200 its reverse (2220466), we get a palindrome (666242666).

The spelling of 664022200 in words is "six hundred sixty-four million, twenty-two thousand, two hundred".