655566413 has 2 divisors, whose sum is σ = 655566414. Its totient is φ = 655566412.

The previous prime is 655566409. The next prime is 655566419. The reversal of 655566413 is 314665556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388799524 + 266766889 = 19718^2 + 16333^2 .

It is a cyclic number.

It is not a de Polignac number, because 655566413 - 2² = 655566409 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655566419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327783206 + 327783207.

It is an arithmetic number, because the mean of its divisors is an integer number (327783207).

Almost surely, 2^655566413 is an apocalyptic number.

It is an amenable number.

655566413 is a deficient number, since it is larger than the sum of its proper divisors (1).

655566413 is an equidigital number, since it uses as much as digits as its factorization.

655566413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 41.

The square root of 655566413 is about 25604.0311865144. The cubic root of 655566413 is about 868.7048209481.

The spelling of 655566413 in words is "six hundred fifty-five million, five hundred sixty-six thousand, four hundred thirteen".