66364525 has 6 divisors (see below), whose sum is σ = 82292042. Its totient is φ = 53091600.

The previous prime is 66364483. The next prime is 66364537. The reversal of 66364525 is 52546366.

It can be written as a sum of positive squares in 3 ways, for example, as 72361 + 66292164 = 269^2 + 8142^2 .

It is not a de Polignac number, because 66364525 - 2¹³ = 66356333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1327266 + ... + 1327315.

Almost surely, 2^66364525 is an apocalyptic number.

It is an amenable number.

66364525 is a deficient number, since it is larger than the sum of its proper divisors (15927517).

66364525 is a wasteful number, since it uses less digits than its factorization.

66364525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2654591 (or 2654586 counting only the distinct ones).

The product of its digits is 129600, while the sum is 37.

The square root of 66364525 is about 8146.4424750930. The cubic root of 66364525 is about 404.8666430823.

The spelling of 66364525 in words is "sixty-six million, three hundred sixty-four thousand, five hundred twenty-five".