6645604750 has 16 divisors (see below), whose sum is σ = 12440572560. Its totient is φ = 2658241800.

The previous prime is 6645604729. The next prime is 6645604753. The reversal of 6645604750 is 574065466.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6645604697 and 6645604706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645604753) 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, 13290960 + ... + 13291459.

It is an arithmetic number, because the mean of its divisors is an integer number (777535785).

Almost surely, 2^6645604750 is an apocalyptic number.

6645604750 is a deficient number, since it is larger than the sum of its proper divisors (5794967810).

6645604750 is a wasteful number, since it uses less digits than its factorization.

6645604750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26582436 (or 26582426 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 43.

The square root of 6645604750 is about 81520.5786902914. The cubic root of 6645604750 is about 1880.0879646105.

The spelling of 6645604750 in words is "six billion, six hundred forty-five million, six hundred four thousand, seven hundred fifty".