665576453 has 2 divisors, whose sum is σ = 665576454. Its totient is φ = 665576452.

The previous prime is 665576437. The next prime is 665576473. The reversal of 665576453 is 354675566.

665576453 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., 370870564 + 294705889 = 19258^2 + 17167^2 .

It is a cyclic number.

It is not a de Polignac number, because 665576453 - 2⁴ = 665576437 is a prime.

It is a super-2 number, since 2×665576453² = 885984029576122418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 665576398 and 665576407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665576473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332788226 + 332788227.

It is an arithmetic number, because the mean of its divisors is an integer number (332788227).

Almost surely, 2^665576453 is an apocalyptic number.

It is an amenable number.

665576453 is a deficient number, since it is larger than the sum of its proper divisors (1).

665576453 is an equidigital number, since it uses as much as digits as its factorization.

665576453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268000, while the sum is 47.

The square root of 665576453 is about 25798.7684395980. The cubic root of 665576453 is about 873.1040102424.

The spelling of 665576453 in words is "six hundred sixty-five million, five hundred seventy-six thousand, four hundred fifty-three".