66796849 has 16 divisors (see below), whose sum is σ = 78480000. Its totient is φ = 56826672.

The previous prime is 66796843. The next prime is 66796957. The reversal of 66796849 is 94869766.

It is not a de Polignac number, because 66796849 - 2³ = 66796841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66796849.

It is not an unprimeable number, because it can be changed into a prime (66796841) 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 15 ways as a sum of consecutive naturals, for example, 50454 + ... + 51760.

It is an arithmetic number, because the mean of its divisors is an integer number (4905000).

Almost surely, 2^66796849 is an apocalyptic number.

It is an amenable number.

66796849 is a deficient number, since it is larger than the sum of its proper divisors (11683151).

66796849 is a wasteful number, since it uses less digits than its factorization.

66796849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477 (or 1463 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 55.

The square root of 66796849 is about 8172.9339285229. The cubic root of 66796849 is about 405.7438931773.

The spelling of 66796849 in words is "sixty-six million, seven hundred ninety-six thousand, eight hundred forty-nine".