66838874 has 8 divisors (see below), whose sum is σ = 104617440. Its totient is φ = 31966396.

The previous prime is 66838861. The next prime is 66838879. The reversal of 66838874 is 47883866.

It is a happy number.

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 (66838879) 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, 726464 + ... + 726555.

It is an arithmetic number, because the mean of its divisors is an integer number (13077180).

Almost surely, 2^66838874 is an apocalyptic number.

66838874 is a deficient number, since it is larger than the sum of its proper divisors (37778566).

66838874 is a wasteful number, since it uses less digits than its factorization.

66838874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453044.

The product of its digits is 1548288, while the sum is 50.

The square root of 66838874 is about 8175.5045104263. The cubic root of 66838874 is about 405.8289661145.

The spelling of 66838874 in words is "sixty-six million, eight hundred thirty-eight thousand, eight hundred seventy-four".