660122653 has 2 divisors, whose sum is σ = 660122654. Its totient is φ = 660122652.

The previous prime is 660122647. The next prime is 660122669. The reversal of 660122653 is 356221066.

660122653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551921049 + 108201604 = 23493^2 + 10402^2 .

It is a cyclic number.

It is not a de Polignac number, because 660122653 - 2²⁵ = 626568221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660122753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330061326 + 330061327.

It is an arithmetic number, because the mean of its divisors is an integer number (330061327).

Almost surely, 2^660122653 is an apocalyptic number.

It is an amenable number.

660122653 is a deficient number, since it is larger than the sum of its proper divisors (1).

660122653 is an equidigital number, since it uses as much as digits as its factorization.

660122653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 660122653 is about 25692.8521772107. The cubic root of 660122653 is about 870.7126995697.

The spelling of 660122653 in words is "six hundred sixty million, one hundred twenty-two thousand, six hundred fifty-three".