6645466026 has 24 divisors (see below), whose sum is σ = 14634553284. Its totient is φ = 2178840960.

The previous prime is 6645466019. The next prime is 6645466027. The reversal of 6645466026 is 6206645466.

It can be written as a sum of positive squares in 2 ways, for example, as 5169753801 + 1475712225 = 71901^2 + 38415^2 .

It is not an unprimeable number, because it can be changed into a prime (6645466027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3025071 + ... + 3027266.

Almost surely, 2^6645466026 is an apocalyptic number.

6645466026 is an abundant number, since it is smaller than the sum of its proper divisors (7989087258).

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

6645466026 is a wasteful number, since it uses less digits than its factorization.

6645466026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6052406 (or 6052403 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The square root of 6645466026 is about 81519.7278332061. The cubic root of 6645466026 is about 1880.0748825236.

The spelling of 6645466026 in words is "six billion, six hundred forty-five million, four hundred sixty-six thousand, twenty-six".