66323525 has 6 divisors (see below), whose sum is σ = 82241202. Its totient is φ = 53058800.

The previous prime is 66323519. The next prime is 66323561. The reversal of 66323525 is 52532366.

It can be written as a sum of positive squares in 3 ways, for example, as 8958049 + 57365476 = 2993^2 + 7574^2 .

It is not a de Polignac number, because 66323525 - 2⁶ = 66323461 is a prime.

It is a super-3 number, since 3×66323525³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66323491 and 66323500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1326446 + ... + 1326495.

It is an arithmetic number, because the mean of its divisors is an integer number (13706867).

Almost surely, 2^66323525 is an apocalyptic number.

It is an amenable number.

66323525 is a deficient number, since it is larger than the sum of its proper divisors (15917677).

66323525 is a wasteful number, since it uses less digits than its factorization.

66323525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652951 (or 2652946 counting only the distinct ones).

The product of its digits is 32400, while the sum is 32.

The square root of 66323525 is about 8143.9256504465. The cubic root of 66323525 is about 404.7832503765.

The spelling of 66323525 in words is "sixty-six million, three hundred twenty-three thousand, five hundred twenty-five".