66880243 has 8 divisors (see below), whose sum is σ = 67914288. Its totient is φ = 65853984.

The previous prime is 66880241. The next prime is 66880277. The reversal of 66880243 is 34208866.

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

It is a cyclic number.

It is not a de Polignac number, because 66880243 - 2¹ = 66880241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66880241) 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, 16705 + ... + 20317.

It is an arithmetic number, because the mean of its divisors is an integer number (8489286).

Almost surely, 2^66880243 is an apocalyptic number.

66880243 is a deficient number, since it is larger than the sum of its proper divisors (1034045).

66880243 is a wasteful number, since it uses less digits than its factorization.

66880243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3893.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 66880243 is about 8178.0341769890. The cubic root of 66880243 is about 405.9126762618.

The spelling of 66880243 in words is "sixty-six million, eight hundred eighty thousand, two hundred forty-three".