66723243 has 8 divisors (see below), whose sum is σ = 89562000. Its totient is φ = 44183328.

The previous prime is 66723233. The next prime is 66723257. The reversal of 66723243 is 34232766.

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

It is not a de Polignac number, because 66723243 - 2⁶ = 66723179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66723233) 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 7 ways as a sum of consecutive naturals, for example, 74188 + ... + 75081.

It is an arithmetic number, because the mean of its divisors is an integer number (11195250).

Almost surely, 2^66723243 is an apocalyptic number.

66723243 is a deficient number, since it is larger than the sum of its proper divisors (22838757).

66723243 is a wasteful number, since it uses less digits than its factorization.

66723243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149421.

The product of its digits is 36288, while the sum is 33.

The square root of 66723243 is about 8168.4296532443. The cubic root of 66723243 is about 405.5948035020.

It can be divided in two parts, 66723 and 243, that added together give a palindrome (66966).

The spelling of 66723243 in words is "sixty-six million, seven hundred twenty-three thousand, two hundred forty-three".