66806274 has 8 divisors (see below), whose sum is σ = 133612560. Its totient is φ = 22268756.

The previous prime is 66806263. The next prime is 66806281. The reversal of 66806274 is 47260866.

66806274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

66806274 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 5567184 + ... + 5567195.

It is an arithmetic number, because the mean of its divisors is an integer number (16701570).

Almost surely, 2^66806274 is an apocalyptic number.

66806274 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66806274 is a wasteful number, since it uses less digits than its factorization.

66806274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11134384.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 66806274 is about 8173.5105065082. The cubic root of 66806274 is about 405.7629756959.

The spelling of 66806274 in words is "sixty-six million, eight hundred six thousand, two hundred seventy-four".