665125933 has 4 divisors (see below), whose sum is σ = 688061340. Its totient is φ = 642190528.

The previous prime is 665125919. The next prime is 665125943. The reversal of 665125933 is 339521566.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 516334729 + 148791204 = 22723^2 + 12198^2 .

It is a cyclic number.

It is not a de Polignac number, because 665125933 - 2¹⁷ = 664994861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665125943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11467660 + ... + 11467717.

It is an arithmetic number, because the mean of its divisors is an integer number (172015335).

Almost surely, 2^665125933 is an apocalyptic number.

It is an amenable number.

665125933 is a deficient number, since it is larger than the sum of its proper divisors (22935407).

665125933 is a wasteful number, since it uses less digits than its factorization.

665125933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22935406.

The product of its digits is 145800, while the sum is 40.

The square root of 665125933 is about 25790.0355370054. The cubic root of 665125933 is about 872.9069682139.

The spelling of 665125933 in words is "six hundred sixty-five million, one hundred twenty-five thousand, nine hundred thirty-three".