665013469 has 8 divisors (see below), whose sum is σ = 689256920. Its totient is φ = 641100096.

The previous prime is 665013449. The next prime is 665013499. The reversal of 665013469 is 964310566.

It can be written as a sum of positive squares in 4 ways, for example, as 243204025 + 421809444 = 15595^2 + 20538^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665013469 - 2¹⁷ = 664882397 is a prime.

It is a super-2 number, since 2×665013469² = 884485827902827922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665013409) 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 in 7 ways as a sum of consecutive naturals, for example, 78414 + ... + 86479.

It is an arithmetic number, because the mean of its divisors is an integer number (86157115).

Almost surely, 2^665013469 is an apocalyptic number.

It is an amenable number.

665013469 is a deficient number, since it is larger than the sum of its proper divisors (24243451).

665013469 is a wasteful number, since it uses less digits than its factorization.

665013469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165039.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 665013469 is about 25787.8550678415. The cubic root of 665013469 is about 872.8577664321.

The spelling of 665013469 in words is "six hundred sixty-five million, thirteen thousand, four hundred sixty-nine".