66868277 has 8 divisors (see below), whose sum is σ = 80443200. Its totient is φ = 54298944.

The previous prime is 66868267. The next prime is 66868279. The reversal of 66868277 is 77286866.

It is a happy number.

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

It is not a de Polignac number, because 66868277 - 2¹⁰ = 66867253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66868279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251252 + ... + 251517.

It is an arithmetic number, because the mean of its divisors is an integer number (10055400).

Almost surely, 2^66868277 is an apocalyptic number.

It is an amenable number.

66868277 is a deficient number, since it is larger than the sum of its proper divisors (13574923).

66868277 is a wasteful number, since it uses less digits than its factorization.

66868277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502795.

The product of its digits is 1354752, while the sum is 50.

The square root of 66868277 is about 8177.3025503524. The cubic root of 66868277 is about 405.8884666170. Note that the first 3 decimals are identical.

The spelling of 66868277 in words is "sixty-six million, eight hundred sixty-eight thousand, two hundred seventy-seven".