662363216449 has 27 divisors (see below), whose sum is σ = 733474772163. Its totient is φ = 597696580800.

The previous prime is 662363216407. The next prime is 662363216453. The reversal of 662363216449 is 944612363266.

The square root of 662363216449 is 813857.

It is a perfect power (a square), and thus also a powerful number.

662363216449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 498143758849 + 164219457600 = 705793^2 + 405240^2 .

It is not a de Polignac number, because 662363216449 - 2⁷ = 662363216321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 662363216396 and 662363216405.

It is not an unprimeable number, because it can be changed into a prime (662363216479) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2157534754 + ... + 2157535060.

Almost surely, 2^662363216449 is an apocalyptic number.

662363216449 is the 813857-th square number.

662363216449 is the 406929-th centered octagonal number.

It is an amenable number.

662363216449 is a deficient number, since it is larger than the sum of its proper divisors (71111555714).

662363216449 is an frugal number, since it uses more digits than its factorization.

With its predecessor (662363216448) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (1118).

662363216449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118 (or 559 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 52.

The spelling of 662363216449 in words is "six hundred sixty-two billion, three hundred sixty-three million, two hundred sixteen thousand, four hundred forty-nine".