66750723 has 20 divisors (see below), whose sum is σ = 107386048. Its totient is φ = 41076720.

The previous prime is 66750713. The next prime is 66750737. The reversal of 66750723 is 32705766.

It is a happy number.

66750723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66750723 - 2¹⁰ = 66749699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66750713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30643 + ... + 32748.

Almost surely, 2^66750723 is an apocalyptic number.

66750723 is a deficient number, since it is larger than the sum of its proper divisors (40635325).

66750723 is a wasteful number, since it uses less digits than its factorization.

66750723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63416 (or 63407 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 66750723 is about 8170.1115659457. Note that the first 3 decimals coincide. The cubic root of 66750723 is about 405.6504773318.

The spelling of 66750723 in words is "sixty-six million, seven hundred fifty thousand, seven hundred twenty-three".