18660141 has 6 divisors (see below), whose sum is σ = 26953550. Its totient is φ = 12440088.

The previous prime is 18660133. The next prime is 18660157. The reversal of 18660141 is 14106681.

18660141 is a `hidden beast` number, since 18 + 6 + 601 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12638025 + 6022116 = 3555^2 + 2454^2 .

It is not a de Polignac number, because 18660141 - 2³ = 18660133 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 (18660841) 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, 1036666 + ... + 1036683.

Almost surely, 2^18660141 is an apocalyptic number.

It is an amenable number.

18660141 is a deficient number, since it is larger than the sum of its proper divisors (8293409).

18660141 is a wasteful number, since it uses less digits than its factorization.

18660141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073355 (or 2073352 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18660141 is about 4319.7385337541. The cubic root of 18660141 is about 265.2395650176.

The spelling of 18660141 in words is "eighteen million, six hundred sixty thousand, one hundred forty-one".