665062523 has 4 divisors (see below), whose sum is σ = 665578968. Its totient is φ = 664546080.

The previous prime is 665062511. The next prime is 665062537. The reversal of 665062523 is 325260566.

665062523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 665062523 - 2¹⁴ = 665046139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665062583) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256286 + ... + 258867.

It is an arithmetic number, because the mean of its divisors is an integer number (166394742).

Almost surely, 2^665062523 is an apocalyptic number.

665062523 is a deficient number, since it is larger than the sum of its proper divisors (516445).

665062523 is a wasteful number, since it uses less digits than its factorization.

665062523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516444.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 665062523 is about 25788.8061569356. The cubic root of 665062523 is about 872.8792277078.

The spelling of 665062523 in words is "six hundred sixty-five million, sixty-two thousand, five hundred twenty-three".