66421274 has 8 divisors (see below), whose sum is σ = 100208340. Its totient is φ = 33018496.

The previous prime is 66421259. The next prime is 66421279. The reversal of 66421274 is 47212466.

66421274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 66178225 + 243049 = 8135^2 + 493^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 66421274.

It is not an unprimeable number, because it can be changed into a prime (66421279) by changing a digit.

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, 95639 + ... + 96330.

Almost surely, 2^66421274 is an apocalyptic number.

66421274 is a deficient number, since it is larger than the sum of its proper divisors (33787066).

66421274 is a wasteful number, since it uses less digits than its factorization.

66421274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192144.

The product of its digits is 16128, while the sum is 32.

The square root of 66421274 is about 8149.9247849290. The cubic root of 66421274 is about 404.9820121056.

The spelling of 66421274 in words is "sixty-six million, four hundred twenty-one thousand, two hundred seventy-four".