6616631315644 has 24 divisors (see below), whose sum is σ = 13503329218400. Its totient is φ = 2835699134688.

The previous prime is 6616631315639. The next prime is 6616631315647. The reversal of 6616631315644 is 4465131366166.

It is a junction number, because it is equal to n+sod(n) for n = 6616631315591 and 6616631315600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616631315647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2411307417 + ... + 2411310160.

Almost surely, 2^{6616631315644} is an apocalyptic number.

It is an amenable number.

6616631315644 is an abundant number, since it is smaller than the sum of its proper divisors (6886697902756).

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

6616631315644 is a wasteful number, since it uses less digits than its factorization.

6616631315644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4822617602 (or 4822617586 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 52.

The spelling of 6616631315644 in words is "six trillion, six hundred sixteen billion, six hundred thirty-one million, three hundred fifteen thousand, six hundred forty-four".