655522691 has 2 divisors, whose sum is σ = 655522692. Its totient is φ = 655522690.

The previous prime is 655522663. The next prime is 655522697. The reversal of 655522691 is 196225556.

655522691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655522691 - 2¹⁰ = 655521667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (655522697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327761345 + 327761346.

It is an arithmetic number, because the mean of its divisors is an integer number (327761346).

Almost surely, 2^655522691 is an apocalyptic number.

655522691 is a deficient number, since it is larger than the sum of its proper divisors (1).

655522691 is an equidigital number, since it uses as much as digits as its factorization.

655522691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162000, while the sum is 41.

The square root of 655522691 is about 25603.1773614136. The cubic root of 655522691 is about 868.6855082053.

The spelling of 655522691 in words is "six hundred fifty-five million, five hundred twenty-two thousand, six hundred ninety-one".