6615581617007 has 8 divisors (see below), whose sum is σ = 7370551279872. Its totient is φ = 5886204146200.

The previous prime is 6615581616979. The next prime is 6615581617013. The reversal of 6615581617007 is 7007161855166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6615581617007 - 2¹⁴ = 6615581600623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6615581617007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6615581617607) 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, 6398047469 + ... + 6398048502.

It is an arithmetic number, because the mean of its divisors is an integer number (921318909984).

Almost surely, 2^{6615581617007} is an apocalyptic number.

6615581617007 is a deficient number, since it is larger than the sum of its proper divisors (754969662865).

6615581617007 is a wasteful number, since it uses less digits than its factorization.

6615581617007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12796096029.

The product of its (nonzero) digits is 2116800, while the sum is 53.

The spelling of 6615581617007 in words is "six trillion, six hundred fifteen billion, five hundred eighty-one million, six hundred seventeen thousand, seven".