117666441 has 6 divisors (see below), whose sum is σ = 169962650. Its totient is φ = 78444288.

The previous prime is 117666431. The next prime is 117666443. The reversal of 117666441 is 144666711.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 60512841 + 57153600 = 7779^2 + 7560^2 .

It is not a de Polignac number, because 117666441 - 2¹⁹ = 117142153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117666396 and 117666405.

It is not an unprimeable number, because it can be changed into a prime (117666443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6537016 + ... + 6537033.

Almost surely, 2^117666441 is an apocalyptic number.

It is an amenable number.

117666441 is a deficient number, since it is larger than the sum of its proper divisors (52296209).

117666441 is a wasteful number, since it uses less digits than its factorization.

117666441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13074055 (or 13074052 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 117666441 is about 10847.4163283245. The cubic root of 117666441 is about 490.0242123257.

The spelling of 117666441 in words is "one hundred seventeen million, six hundred sixty-six thousand, four hundred forty-one".