66106741 has 4 divisors (see below), whose sum is σ = 67354092. Its totient is φ = 64859392.

The previous prime is 66106723. The next prime is 66106759. The reversal of 66106741 is 14760166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14760166 = 2 ⋅7380083.

It is an interprime number because it is at equal distance from previous prime (66106723) and next prime (66106759).

It can be written as a sum of positive squares in 2 ways, for example, as 23726641 + 42380100 = 4871^2 + 6510^2 .

It is a cyclic number.

It is not a de Polignac number, because 66106741 - 2⁷ = 66106613 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 (66106721) 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, 623596 + ... + 623701.

It is an arithmetic number, because the mean of its divisors is an integer number (16838523).

Almost surely, 2^66106741 is an apocalyptic number.

It is an amenable number.

66106741 is a deficient number, since it is larger than the sum of its proper divisors (1247351).

66106741 is a wasteful number, since it uses less digits than its factorization.

66106741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247350.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 66106741 is about 8130.6052050263. The cubic root of 66106741 is about 404.3417463360.

The spelling of 66106741 in words is "sixty-six million, one hundred six thousand, seven hundred forty-one".