66285473 has 4 divisors (see below), whose sum is σ = 66682560. Its totient is φ = 65888388.

The previous prime is 66285449. The next prime is 66285487. The reversal of 66285473 is 37458266.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66285473 - 2¹⁸ = 66023329 is a prime.

It is a super-3 number, since 3×66285473³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66285473.

It is not an unprimeable number, because it can be changed into a prime (66285073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198293 + ... + 198626.

It is an arithmetic number, because the mean of its divisors is an integer number (16670640).

Almost surely, 2^66285473 is an apocalyptic number.

It is an amenable number.

66285473 is a deficient number, since it is larger than the sum of its proper divisors (397087).

66285473 is a wasteful number, since it uses less digits than its factorization.

66285473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397086.

The product of its digits is 241920, while the sum is 41.

The square root of 66285473 is about 8141.5890955022. The cubic root of 66285473 is about 404.7058230539.

The spelling of 66285473 in words is "sixty-six million, two hundred eighty-five thousand, four hundred seventy-three".