6648780733 has 32 divisors (see below), whose sum is σ = 8119699200. Its totient is φ = 5314581504.

The previous prime is 6648780727. The next prime is 6648780737. The reversal of 6648780733 is 3370878466.

It is a cyclic number.

It is not a de Polignac number, because 6648780733 - 2²¹ = 6646683581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6648780737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7330066 + ... + 7330972.

It is an arithmetic number, because the mean of its divisors is an integer number (253740600).

Almost surely, 2^6648780733 is an apocalyptic number.

It is an amenable number.

6648780733 is a deficient number, since it is larger than the sum of its proper divisors (1470918467).

6648780733 is a wasteful number, since it uses less digits than its factorization.

6648780733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The square root of 6648780733 is about 81540.0560031694. The cubic root of 6648780733 is about 1880.3874194972.

The spelling of 6648780733 in words is "six billion, six hundred forty-eight million, seven hundred eighty thousand, seven hundred thirty-three".