6645426245466 has 16 divisors (see below), whose sum is σ = 13749157749600. Its totient is φ = 2138757872048.

The previous prime is 6645426245441. The next prime is 6645426245467.

It is a happy number.

6645426245466 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (6645426245467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19096052256 + ... + 19096052603.

It is an arithmetic number, because the mean of its divisors is an integer number (859322359350).

Almost surely, 2^{6645426245466} is an apocalyptic number.

6645426245466 is an abundant number, since it is smaller than the sum of its proper divisors (7103731504134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6645426245466 is a wasteful number, since it uses less digits than its factorization.

6645426245466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38192104893.

The product of its digits is 199065600, while the sum is 60.

The spelling of 6645426245466 in words is "six trillion, six hundred forty-five billion, four hundred twenty-six million, two hundred forty-five thousand, four hundred sixty-six".