6642240424 has 16 divisors (see below), whose sum is σ = 12757962420. Its totient is φ = 3240117120.

The previous prime is 6642240379. The next prime is 6642240427. The reversal of 6642240424 is 4240422466.

It can be written as a sum of positive squares in 2 ways, for example, as 6639316324 + 2924100 = 81482^2 + 1710^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6642240424.

It is not an unprimeable number, because it can be changed into a prime (6642240427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10125039 + ... + 10125694.

Almost surely, 2^6642240424 is an apocalyptic number.

It is an amenable number.

6642240424 is a deficient number, since it is larger than the sum of its proper divisors (6115721996).

6642240424 is a wasteful number, since it uses less digits than its factorization.

6642240424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20250780 (or 20250776 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

The square root of 6642240424 is about 81499.9412515126. The cubic root of 6642240424 is about 1879.7706472888.

The spelling of 6642240424 in words is "six billion, six hundred forty-two million, two hundred forty thousand, four hundred twenty-four".