664634241444 has 48 divisors (see below), whose sum is σ = 1570605563520. Its totient is φ = 218729702400.

The previous prime is 664634241407. The next prime is 664634241461. The reversal of 664634241444 is 444142436466.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 664634241393 and 664634241402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348904 + ... + 1204575.

It is an arithmetic number, because the mean of its divisors is an integer number (32720949240).

Almost surely, 2^664634241444 is an apocalyptic number.

It is an amenable number.

664634241444 is an abundant number, since it is smaller than the sum of its proper divisors (905971322076).

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

664634241444 is a wasteful number, since it uses less digits than its factorization.

664634241444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553940 (or 1553938 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 48.

The spelling of 664634241444 in words is "six hundred sixty-four billion, six hundred thirty-four million, two hundred forty-one thousand, four hundred forty-four".