66730853 has 4 divisors (see below), whose sum is σ = 76263840. Its totient is φ = 57197868.

The previous prime is 66730837. The next prime is 66730897. The reversal of 66730853 is 35803766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35803766 = 2 ⋅17901883.

It is not a de Polignac number, because 66730853 - 2⁴ = 66730837 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 (66730813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4766483 + ... + 4766496.

It is an arithmetic number, because the mean of its divisors is an integer number (19065960).

Almost surely, 2^66730853 is an apocalyptic number.

It is an amenable number.

66730853 is a deficient number, since it is larger than the sum of its proper divisors (9532987).

66730853 is an equidigital number, since it uses as much as digits as its factorization.

66730853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9532986.

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 66730853 is about 8168.8954577715. The cubic root of 66730853 is about 405.6102227122.

The spelling of 66730853 in words is "sixty-six million, seven hundred thirty thousand, eight hundred fifty-three".