665309029 has 24 divisors (see below), whose sum is σ = 849396672. Its totient is φ = 506257920.

The previous prime is 665309003. The next prime is 665309089. The reversal of 665309029 is 920903566.

It is not a de Polignac number, because 665309029 - 2⁷ = 665308901 is a prime.

It is a super-2 number, since 2×665309029² = 885272208137845682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665308982 and 665309000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665309089) 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 in 23 ways as a sum of consecutive naturals, for example, 140037 + ... + 144709.

It is an arithmetic number, because the mean of its divisors is an integer number (35391528).

Almost surely, 2^665309029 is an apocalyptic number.

It is an amenable number.

665309029 is a deficient number, since it is larger than the sum of its proper divisors (184087643).

665309029 is a wasteful number, since it uses less digits than its factorization.

665309029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4777 (or 4734 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 665309029 is about 25793.5850358185. The cubic root of 665309029 is about 872.9870588668.

The spelling of 665309029 in words is "six hundred sixty-five million, three hundred nine thousand, twenty-nine".