6615982783 has 2 divisors, whose sum is σ = 6615982784. Its totient is φ = 6615982782.

The previous prime is 6615982717. The next prime is 6615982817. The reversal of 6615982783 is 3872895166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6615982783 - 2⁹ = 6615982271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6615982183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3307991391 + 3307991392.

It is an arithmetic number, because the mean of its divisors is an integer number (3307991392).

Almost surely, 2^6615982783 is an apocalyptic number.

6615982783 is a deficient number, since it is larger than the sum of its proper divisors (1).

6615982783 is an equidigital number, since it uses as much as digits as its factorization.

6615982783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 55.

The square root of 6615982783 is about 81338.6917954795. The cubic root of 6615982783 is about 1877.2903834589.

The spelling of 6615982783 in words is "six billion, six hundred fifteen million, nine hundred eighty-two thousand, seven hundred eighty-three".