6655205215651 has 2 divisors, whose sum is σ = 6655205215652. Its totient is φ = 6655205215650.

The previous prime is 6655205215649. The next prime is 6655205215669. The reversal of 6655205215651 is 1565125025566.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6655205215651 - 2¹ = 6655205215649 is a prime.

Together with 6655205215649, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 6655205215595 and 6655205215604.

It is not a weakly prime, because it can be changed into another prime (6655205215691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3327602607825 + 3327602607826.

It is an arithmetic number, because the mean of its divisors is an integer number (3327602607826).

Almost surely, 2^{6655205215651} is an apocalyptic number.

6655205215651 is a deficient number, since it is larger than the sum of its proper divisors (1).

6655205215651 is an equidigital number, since it uses as much as digits as its factorization.

6655205215651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700000, while the sum is 49.

The spelling of 6655205215651 in words is "six trillion, six hundred fifty-five billion, two hundred five million, two hundred fifteen thousand, six hundred fifty-one".