662311551409 has 2 divisors, whose sum is σ = 662311551410. Its totient is φ = 662311551408.

The previous prime is 662311551397. The next prime is 662311551457. The reversal of 662311551409 is 904155113266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660408149025 + 1903402384 = 812655^2 + 43628^2 .

It is a cyclic number.

It is not a de Polignac number, because 662311551409 - 2³³ = 653721616817 is a prime.

It is a super-2 number, since 2×662311551409² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (662311521409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331155775704 + 331155775705.

It is an arithmetic number, because the mean of its divisors is an integer number (331155775705).

Almost surely, 2^662311551409 is an apocalyptic number.

It is an amenable number.

662311551409 is a deficient number, since it is larger than the sum of its proper divisors (1).

662311551409 is an equidigital number, since it uses as much as digits as its factorization.

662311551409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 662311551409 in words is "six hundred sixty-two billion, three hundred eleven million, five hundred fifty-one thousand, four hundred nine".