66844874 has 8 divisors (see below), whose sum is σ = 101394180. Its totient is φ = 33046816.

The previous prime is 66844861. The next prime is 66844879. The reversal of 66844874 is 47844866.

It can be written as a sum of positive squares in 2 ways, for example, as 64722025 + 2122849 = 8045^2 + 1457^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66844879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187589 + ... + 187944.

Almost surely, 2^66844874 is an apocalyptic number.

66844874 is a deficient number, since it is larger than the sum of its proper divisors (34549306).

66844874 is a wasteful number, since it uses less digits than its factorization.

66844874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375624.

The product of its digits is 1032192, while the sum is 47.

The square root of 66844874 is about 8175.8714520227. The cubic root of 66844874 is about 405.8411092521.

The spelling of 66844874 in words is "sixty-six million, eight hundred forty-four thousand, eight hundred seventy-four".