723166661359 has 2 divisors, whose sum is σ = 723166661360. Its totient is φ = 723166661358.

The previous prime is 723166661299. The next prime is 723166661407. The reversal of 723166661359 is 953166661327.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 723166661359 - 2²⁷ = 723032443631 is a prime.

It is a super-2 number, since 2×723166661359² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (723166661059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361583330679 + 361583330680.

It is an arithmetic number, because the mean of its divisors is an integer number (361583330680).

Almost surely, 2^723166661359 is an apocalyptic number.

723166661359 is a deficient number, since it is larger than the sum of its proper divisors (1).

723166661359 is an equidigital number, since it uses as much as digits as its factorization.

723166661359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7348320, while the sum is 55.

The spelling of 723166661359 in words is "seven hundred twenty-three billion, one hundred sixty-six million, six hundred sixty-one thousand, three hundred fifty-nine".