66746041 has 4 divisors (see below), whose sum is σ = 67358500. Its totient is φ = 66133584.

The previous prime is 66746033. The next prime is 66746083. The reversal of 66746041 is 14064766.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14064766 = 2 ⋅7032383.

It can be written as a sum of positive squares in 2 ways, for example, as 38390416 + 28355625 = 6196^2 + 5325^2 .

It is a cyclic number.

It is not a de Polignac number, because 66746041 - 2³ = 66746033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66745988 and 66746006.

It is not an unprimeable number, because it can be changed into a prime (66746741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306066 + ... + 306283.

It is an arithmetic number, because the mean of its divisors is an integer number (16839625).

Almost surely, 2^66746041 is an apocalyptic number.

It is an amenable number.

66746041 is a deficient number, since it is larger than the sum of its proper divisors (612459).

66746041 is a wasteful number, since it uses less digits than its factorization.

66746041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612458.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 66746041 is about 8169.8250287261. The cubic root of 66746041 is about 405.6409927906.

The spelling of 66746041 in words is "sixty-six million, seven hundred forty-six thousand, forty-one".