6645983415 has 16 divisors (see below), whose sum is σ = 10642255200. Its totient is φ = 3541630592.

The previous prime is 6645983339. The next prime is 6645983429. The reversal of 6645983415 is 5143895466.

It is a cyclic number.

It is not a de Polignac number, because 6645983415 - 2¹⁶ = 6645917879 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161820 + ... + 198689.

It is an arithmetic number, because the mean of its divisors is an integer number (665140950).

Almost surely, 2^6645983415 is an apocalyptic number.

6645983415 is a deficient number, since it is larger than the sum of its proper divisors (3996271785).

6645983415 is a wasteful number, since it uses less digits than its factorization.

6645983415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361746.

The product of its digits is 3110400, while the sum is 51.

The square root of 6645983415 is about 81522.9011689353. The cubic root of 6645983415 is about 1880.1236729227.

The spelling of 6645983415 in words is "six billion, six hundred forty-five million, nine hundred eighty-three thousand, four hundred fifteen".