66886441 has 12 divisors (see below), whose sum is σ = 73037700. Its totient is φ = 61171488.

The previous prime is 66886429. The next prime is 66886451. The reversal of 66886441 is 14468866.

It can be written as a sum of positive squares in 2 ways, for example, as 11696400 + 55190041 = 3420^2 + 7429^2 .

It is not a de Polignac number, because 66886441 - 2²¹ = 64789289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66886411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7275 + ... + 13663.

It is an arithmetic number, because the mean of its divisors is an integer number (6086475).

Almost surely, 2^66886441 is an apocalyptic number.

It is an amenable number.

66886441 is a deficient number, since it is larger than the sum of its proper divisors (6151259).

66886441 is a wasteful number, since it uses less digits than its factorization.

66886441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6456 (or 6437 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 66886441 is about 8178.4131101333. The cubic root of 66886441 is about 405.9252149376.

The spelling of 66886441 in words is "sixty-six million, eight hundred eighty-six thousand, four hundred forty-one".