6601621466613 has 8 divisors (see below), whose sum is σ = 8802185792800. Its totient is φ = 4401069059088.

The previous prime is 6601621466599. The next prime is 6601621466621. The reversal of 6601621466613 is 3166641261066.

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

It is not a de Polignac number, because 6601621466613 - 2²⁸ = 6601353031157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601621466623) 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, 1595383 + ... + 3968436.

It is an arithmetic number, because the mean of its divisors is an integer number (1100273224100).

Almost surely, 2^{6601621466613} is an apocalyptic number.

It is an amenable number.

6601621466613 is a deficient number, since it is larger than the sum of its proper divisors (2200564326187).

6601621466613 is a wasteful number, since it uses less digits than its factorization.

6601621466613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959331.

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 6601621466613 in words is "six trillion, six hundred one billion, six hundred twenty-one million, four hundred sixty-six thousand, six hundred thirteen".