66106585 has 4 divisors (see below), whose sum is σ = 79327908. Its totient is φ = 52885264.

The previous prime is 66106583. The next prime is 66106589. The reversal of 66106585 is 58560166.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48734361 + 17372224 = 6981^2 + 4168^2 .

It is a cyclic number.

It is not a de Polignac number, because 66106585 - 2¹ = 66106583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66106583) 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, 6610654 + ... + 6610663.

It is an arithmetic number, because the mean of its divisors is an integer number (19831977).

Almost surely, 2^66106585 is an apocalyptic number.

It is an amenable number.

66106585 is a deficient number, since it is larger than the sum of its proper divisors (13221323).

66106585 is a wasteful number, since it uses less digits than its factorization.

66106585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13221322.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 66106585 is about 8130.5956116388. The cubic root of 66106585 is about 404.3414282779.

The spelling of 66106585 in words is "sixty-six million, one hundred six thousand, five hundred eighty-five".