6645117470 has 8 divisors (see below), whose sum is σ = 11961211464. Its totient is φ = 2658046984.

The previous prime is 6645117439. The next prime is 6645117487. The reversal of 6645117470 is 747115466.

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

It is a Curzon 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, 332255864 + ... + 332255883.

It is an arithmetic number, because the mean of its divisors is an integer number (1495151433).

Almost surely, 2^6645117470 is an apocalyptic number.

6645117470 is a deficient number, since it is larger than the sum of its proper divisors (5316093994).

6645117470 is a wasteful number, since it uses less digits than its factorization.

6645117470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664511754.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 6645117470 is about 81517.5899422940. The cubic root of 6645117470 is about 1880.0420118498.

The spelling of 6645117470 in words is "six billion, six hundred forty-five million, one hundred seventeen thousand, four hundred seventy".