6601113215 has 4 divisors (see below), whose sum is σ = 7921335864. Its totient is φ = 5280890568.

The previous prime is 6601113191. The next prime is 6601113221. The reversal of 6601113215 is 5123111066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6601113215 - 2¹⁸ = 6600851071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660111317 + ... + 660111326.

It is an arithmetic number, because the mean of its divisors is an integer number (1980333966).

Almost surely, 2^6601113215 is an apocalyptic number.

6601113215 is a deficient number, since it is larger than the sum of its proper divisors (1320222649).

6601113215 is a wasteful number, since it uses less digits than its factorization.

6601113215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320222648.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 6601113215 is about 81247.2351221874. The cubic root of 6601113215 is about 1875.8829112361.

The spelling of 6601113215 in words is "six billion, six hundred one million, one hundred thirteen thousand, two hundred fifteen".