66748511 has 8 divisors (see below), whose sum is σ = 70878240. Its totient is φ = 62641408.

The previous prime is 66748489. The next prime is 66748531. The reversal of 66748511 is 11584766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66748511 - 2⁶ = 66748447 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66748531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 635 + ... + 11571.

It is an arithmetic number, because the mean of its divisors is an integer number (8859780).

Almost surely, 2^66748511 is an apocalyptic number.

66748511 is a deficient number, since it is larger than the sum of its proper divisors (4129729).

66748511 is a wasteful number, since it uses less digits than its factorization.

66748511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11313.

The product of its digits is 40320, while the sum is 38.

The square root of 66748511 is about 8169.9761933558. The cubic root of 66748511 is about 405.6459964377.

The spelling of 66748511 in words is "sixty-six million, seven hundred forty-eight thousand, five hundred eleven".