656654441 has 2 divisors, whose sum is σ = 656654442. Its totient is φ = 656654440.

The previous prime is 656654423. The next prime is 656654443. The reversal of 656654441 is 144456656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640292416 + 16362025 = 25304^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 656654441 - 2⁶ = 656654377 is a prime.

Together with 656654443, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (656654443) 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, 328327220 + 328327221.

It is an arithmetic number, because the mean of its divisors is an integer number (328327221).

Almost surely, 2^656654441 is an apocalyptic number.

It is an amenable number.

656654441 is a deficient number, since it is larger than the sum of its proper divisors (1).

656654441 is an equidigital number, since it uses as much as digits as its factorization.

656654441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 41.

The square root of 656654441 is about 25625.2695790698. The cubic root of 656654441 is about 869.1851449025.

The spelling of 656654441 in words is "six hundred fifty-six million, six hundred fifty-four thousand, four hundred forty-one".