66004101 has 6 divisors (see below), whose sum is σ = 95339270. Its totient is φ = 44002728.

The previous prime is 66004093. The next prime is 66004111. The reversal of 66004101 is 10140066.

66004101 is a `hidden beast` number, since 660 + 0 + 4 + 1 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 64016001 + 1988100 = 8001^2 + 1410^2 .

It is not a de Polignac number, because 66004101 - 2³ = 66004093 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 (66004111) 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, 3666886 + ... + 3666903.

Almost surely, 2^66004101 is an apocalyptic number.

It is an amenable number.

66004101 is a deficient number, since it is larger than the sum of its proper divisors (29335169).

66004101 is a wasteful number, since it uses less digits than its factorization.

66004101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7333795 (or 7333792 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 66004101 is about 8124.2907998175. The cubic root of 66004101 is about 404.1323721542.

Adding to 66004101 its reverse (10140066), we get a palindrome (76144167).

It can be divided in two parts, 6600 and 4101, that added together give a palindrome (10701).

The spelling of 66004101 in words is "sixty-six million, four thousand, one hundred one".