1642666336 has 24 divisors (see below), whose sum is σ = 3282272280. Its totient is φ = 809073408.

The previous prime is 1642666331. The next prime is 1642666357. The reversal of 1642666336 is 6336662461.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1642666292 and 1642666301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642666331) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 380941 + ... + 385228.

It is an arithmetic number, because the mean of its divisors is an integer number (136761345).

Almost surely, 2^1642666336 is an apocalyptic number.

1642666336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1642666336 is a deficient number, since it is larger than the sum of its proper divisors (1639605944).

1642666336 is an equidigital number, since it uses as much as digits as its factorization.

1642666336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766246 (or 766238 counting only the distinct ones).

The product of its digits is 559872, while the sum is 43.

The square root of 1642666336 is about 40529.8203302211. The cubic root of 1642666336 is about 1179.9124554414.

The spelling of 1642666336 in words is "one billion, six hundred forty-two million, six hundred sixty-six thousand, three hundred thirty-six".