665252430 has 32 divisors (see below), whose sum is σ = 1597286304. Its totient is φ = 177325056.

The previous prime is 665252363. The next prime is 665252477. The reversal of 665252430 is 34252566.

It is a junction number, because it is equal to n+sod(n) for n = 665252391 and 665252400.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 127554 + ... + 132666.

It is an arithmetic number, because the mean of its divisors is an integer number (49915197).

Almost surely, 2^665252430 is an apocalyptic number.

665252430 is an abundant number, since it is smaller than the sum of its proper divisors (932033874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665252430 is a wasteful number, since it uses less digits than its factorization.

665252430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9460.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 665252430 is about 25792.4878598401. The cubic root of 665252430 is about 872.9623026540.

The spelling of 665252430 in words is "six hundred sixty-five million, two hundred fifty-two thousand, four hundred thirty".