6655739784497 has 2 divisors, whose sum is σ = 6655739784498. Its totient is φ = 6655739784496.

The previous prime is 6655739784487. The next prime is 6655739784509. The reversal of 6655739784497 is 7944879375566.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6446845996096 + 208893788401 = 2539064^2 + 457049^2 .

It is a cyclic number.

It is not a de Polignac number, because 6655739784497 - 2¹⁴ = 6655739768113 is a prime.

It is not a weakly prime, because it can be changed into another prime (6655739784487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3327869892248 + 3327869892249.

It is an arithmetic number, because the mean of its divisors is an integer number (3327869892249).

Almost surely, 2^{6655739784497} is an apocalyptic number.

It is an amenable number.

6655739784497 is a deficient number, since it is larger than the sum of its proper divisors (1).

6655739784497 is an equidigital number, since it uses as much as digits as its factorization.

6655739784497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9601804800, while the sum is 80.

The spelling of 6655739784497 in words is "six trillion, six hundred fifty-five billion, seven hundred thirty-nine million, seven hundred eighty-four thousand, four hundred ninety-seven".