655516577 has 2 divisors, whose sum is σ = 655516578. Its totient is φ = 655516576.

The previous prime is 655516571. The next prime is 655516601. The reversal of 655516577 is 775615556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 414366736 + 241149841 = 20356^2 + 15529^2 .

It is a cyclic number.

It is not a de Polignac number, because 655516577 - 2⁶ = 655516513 is a prime.

It is not a weakly prime, because it can be changed into another prime (655516571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327758288 + 327758289.

It is an arithmetic number, because the mean of its divisors is an integer number (327758289).

Almost surely, 2^655516577 is an apocalyptic number.

It is an amenable number.

655516577 is a deficient number, since it is larger than the sum of its proper divisors (1).

655516577 is an equidigital number, since it uses as much as digits as its factorization.

655516577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102500, while the sum is 47.

The square root of 655516577 is about 25603.0579618920. The cubic root of 655516577 is about 868.6828074803.

It can be divided in two parts, 6555 and 16577, that added together give a palindrome (23132).

The spelling of 655516577 in words is "six hundred fifty-five million, five hundred sixteen thousand, five hundred seventy-seven".