66748605 has 32 divisors (see below), whose sum is σ = 133152768. Its totient is φ = 27739200.

The previous prime is 66748597. The next prime is 66748607. The reversal of 66748605 is 50684766.

It is a happy number.

It is not a de Polignac number, because 66748605 - 2³ = 66748597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66748607) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27741 + ... + 30050.

It is an arithmetic number, because the mean of its divisors is an integer number (4161024).

Almost surely, 2^66748605 is an apocalyptic number.

It is an amenable number.

66748605 is a deficient number, since it is larger than the sum of its proper divisors (66404163).

66748605 is a wasteful number, since it uses less digits than its factorization.

66748605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57817.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 66748605 is about 8169.9819461245. The cubic root of 66748605 is about 405.6461868574.

The spelling of 66748605 in words is "sixty-six million, seven hundred forty-eight thousand, six hundred five".