66880827 has 24 divisors (see below), whose sum is σ = 105753648. Its totient is φ = 40478400.

The previous prime is 66880811. The next prime is 66880841. The reversal of 66880827 is 72808866.

It is not a de Polignac number, because 66880827 - 2⁴ = 66880811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66880727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2452 + ... + 11822.

It is an arithmetic number, because the mean of its divisors is an integer number (4406402).

Almost surely, 2^66880827 is an apocalyptic number.

66880827 is a deficient number, since it is larger than the sum of its proper divisors (38872821).

66880827 is a wasteful number, since it uses less digits than its factorization.

66880827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9451 (or 9448 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 66880827 is about 8178.0698823133. The cubic root of 66880827 is about 405.9138577384.

The spelling of 66880827 in words is "sixty-six million, eight hundred eighty thousand, eight hundred twenty-seven".