6645220792703 has 8 divisors (see below), whose sum is σ = 6934174695648. Its totient is φ = 6356269494784.

The previous prime is 6645220792673. The next prime is 6645220792781. The reversal of 6645220792703 is 3072970225466.

It is a happy number.

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 6645220792703 - 2²⁸ = 6644952357247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645220762703) 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, 6012251 + ... + 7031187.

It is an arithmetic number, because the mean of its divisors is an integer number (866771836956).

Almost surely, 2^{6645220792703} is an apocalyptic number.

6645220792703 is a deficient number, since it is larger than the sum of its proper divisors (288953902945).

6645220792703 is a wasteful number, since it uses less digits than its factorization.

6645220792703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302513.

The product of its (nonzero) digits is 7620480, while the sum is 53.

The spelling of 6645220792703 in words is "six trillion, six hundred forty-five billion, two hundred twenty million, seven hundred ninety-two thousand, seven hundred three".