6645117471 has 8 divisors (see below), whose sum is σ = 9381342384. Its totient is φ = 4169485440.

The previous prime is 6645117439. The next prime is 6645117487. The reversal of 6645117471 is 1747115466.

It is a happy number.

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

It is not a de Polignac number, because 6645117471 - 2⁵ = 6645117439 is a prime.

It is a super-3 number, since 3×6645117471³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645117421) 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, 65148160 + ... + 65148261.

It is an arithmetic number, because the mean of its divisors is an integer number (1172667798).

Almost surely, 2^6645117471 is an apocalyptic number.

6645117471 is a deficient number, since it is larger than the sum of its proper divisors (2736224913).

6645117471 is a wasteful number, since it uses less digits than its factorization.

6645117471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130296441.

The product of its digits is 141120, while the sum is 42.

The square root of 6645117471 is about 81517.5899484277. The cubic root of 6645117471 is about 1880.0420119441.

The spelling of 6645117471 in words is "six billion, six hundred forty-five million, one hundred seventeen thousand, four hundred seventy-one".