664624062220 has 48 divisors (see below), whose sum is σ = 1428338263968. Its totient is φ = 259636285440.

The previous prime is 664624062217. The next prime is 664624062233. The reversal of 664624062220 is 22260426466.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8040300 + ... + 8122540.

It is an arithmetic number, because the mean of its divisors is an integer number (29757047166).

Almost surely, 2^664624062220 is an apocalyptic number.

It is an amenable number.

664624062220 is an abundant number, since it is smaller than the sum of its proper divisors (763714201748).

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

664624062220 is a wasteful number, since it uses less digits than its factorization.

664624062220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91690 (or 91688 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

Adding to 664624062220 its reverse (22260426466), we get a palindrome (686884488686).

The spelling of 664624062220 in words is "six hundred sixty-four billion, six hundred twenty-four million, sixty-two thousand, two hundred twenty".