66465243 has 24 divisors (see below), whose sum is σ = 103735632. Its totient is φ = 40765248.

The previous prime is 66465241. The next prime is 66465253. The reversal of 66465243 is 34256466.

66465243 is a `hidden beast` number, since 6 + 646 + 5 + 2 + 4 + 3 = 666.

It is not a de Polignac number, because 66465243 - 2¹ = 66465241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66465198 and 66465207.

It is not an unprimeable number, because it can be changed into a prime (66465241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42880 + ... + 44402.

It is an arithmetic number, because the mean of its divisors is an integer number (4322318).

Almost surely, 2^66465243 is an apocalyptic number.

66465243 is a deficient number, since it is larger than the sum of its proper divisors (37270389).

66465243 is a wasteful number, since it uses less digits than its factorization.

66465243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915 (or 1912 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 66465243 is about 8152.6218482155. The cubic root of 66465243 is about 405.0713545973.

The spelling of 66465243 in words is "sixty-six million, four hundred sixty-five thousand, two hundred forty-three".