6646457463603 has 32 divisors (see below), whose sum is σ = 9523016294400. Its totient is φ = 4113744244896.

The previous prime is 6646457463587. The next prime is 6646457463637. The reversal of 6646457463603 is 3063647546466.

It is a happy number.

It is not a de Polignac number, because 6646457463603 - 2⁴ = 6646457463587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6646457463643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10011525 + ... + 10654742.

It is an arithmetic number, because the mean of its divisors is an integer number (297594259200).

Almost surely, 2^{6646457463603} is an apocalyptic number.

6646457463603 is a deficient number, since it is larger than the sum of its proper divisors (2876558830797).

6646457463603 is a wasteful number, since it uses less digits than its factorization.

6646457463603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20666431.

The product of its (nonzero) digits is 156764160, while the sum is 60.

The spelling of 6646457463603 in words is "six trillion, six hundred forty-six billion, four hundred fifty-seven million, four hundred sixty-three thousand, six hundred three".