6646024426 has 4 divisors (see below), whose sum is σ = 9969036642. Its totient is φ = 3323012212.

The previous prime is 6646024391. The next prime is 6646024433. The reversal of 6646024426 is 6244206466.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6244206466 = 2 ⋅3122103233.

It can be written as a sum of positive squares in only one way, i.e., 3763945201 + 2882079225 = 61351^2 + 53685^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1661506105 + ... + 1661506108.

Almost surely, 2^6646024426 is an apocalyptic number.

6646024426 is a deficient number, since it is larger than the sum of its proper divisors (3323012216).

6646024426 is a wasteful number, since it uses less digits than its factorization.

6646024426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3323012215.

The product of its (nonzero) digits is 331776, while the sum is 40.

The square root of 6646024426 is about 81523.1526990952. The cubic root of 6646024426 is about 1880.1275402006.

The spelling of 6646024426 in words is "six billion, six hundred forty-six million, twenty-four thousand, four hundred twenty-six".