6645256923 has 8 divisors (see below), whose sum is σ = 8948069136. Its totient is φ = 4386308000.

The previous prime is 6645256909. The next prime is 6645256927. The reversal of 6645256923 is 3296525466.

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 6645256923 - 2¹⁰ = 6645255899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6645256927) 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, 10965468 + ... + 10966073.

It is an arithmetic number, because the mean of its divisors is an integer number (1118508642).

Almost surely, 2^6645256923 is an apocalyptic number.

6645256923 is a deficient number, since it is larger than the sum of its proper divisors (2302812213).

6645256923 is a wasteful number, since it uses less digits than its factorization.

6645256923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21931645.

The product of its digits is 2332800, while the sum is 48.

The square root of 6645256923 is about 81518.4452930746. The cubic root of 6645256923 is about 1880.0551631430.

The spelling of 6645256923 in words is "six billion, six hundred forty-five million, two hundred fifty-six thousand, nine hundred twenty-three".