6660855623 has 2 divisors, whose sum is σ = 6660855624. Its totient is φ = 6660855622.

The previous prime is 6660855611. The next prime is 6660855709. The reversal of 6660855623 is 3265580666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6660855623 - 2⁶ = 6660855559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6660852623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3330427811 + 3330427812.

It is an arithmetic number, because the mean of its divisors is an integer number (3330427812).

Almost surely, 2^6660855623 is an apocalyptic number.

6660855623 is a deficient number, since it is larger than the sum of its proper divisors (1).

6660855623 is an equidigital number, since it uses as much as digits as its factorization.

6660855623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The square root of 6660855623 is about 81614.0651052256. The cubic root of 6660855623 is about 1881.5250586539.

The spelling of 6660855623 in words is "six billion, six hundred sixty million, eight hundred fifty-five thousand, six hundred twenty-three".