66792238 has 4 divisors (see below), whose sum is σ = 100188360. Its totient is φ = 33396118.

The previous prime is 66792227. The next prime is 66792241. The reversal of 66792238 is 83229766.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×66792238² = 8922406114097288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66792194 and 66792203.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16698058 + ... + 16698061.

It is an arithmetic number, because the mean of its divisors is an integer number (25047090).

Almost surely, 2^66792238 is an apocalyptic number.

66792238 is a deficient number, since it is larger than the sum of its proper divisors (33396122).

66792238 is a wasteful number, since it uses less digits than its factorization.

66792238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33396121.

The product of its digits is 217728, while the sum is 43.

The square root of 66792238 is about 8172.6518340132. The cubic root of 66792238 is about 405.7345567681.

The spelling of 66792238 in words is "sixty-six million, seven hundred ninety-two thousand, two hundred thirty-eight".