66274385 has 8 divisors (see below), whose sum is σ = 82987200. Its totient is φ = 50714224.

The previous prime is 66274379. The next prime is 66274391. The reversal of 66274385 is 58347266.

It is a happy number.

66274385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66274379) and next prime (66274391).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66274385 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288035 + ... + 288264.

It is an arithmetic number, because the mean of its divisors is an integer number (10373400).

Almost surely, 2^66274385 is an apocalyptic number.

It is an amenable number.

66274385 is a deficient number, since it is larger than the sum of its proper divisors (16712815).

66274385 is a wasteful number, since it uses less digits than its factorization.

66274385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576327.

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

The square root of 66274385 is about 8140.9081188772. The cubic root of 66274385 is about 404.6832558750.

The spelling of 66274385 in words is "sixty-six million, two hundred seventy-four thousand, three hundred eighty-five".