66243072 has 160 divisors (see below), whose sum is σ = 207022464. Its totient is φ = 18432000.

The previous prime is 66243053. The next prime is 66243077. The reversal of 66243072 is 27034266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66243077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655822 + ... + 655922.

Almost surely, 2^66243072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66243072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103511232).

66243072 is an abundant number, since it is smaller than the sum of its proper divisors (140779392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66243072 is a wasteful number, since it uses less digits than its factorization.

66243072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 66243072 is about 8138.9847032661. The cubic root of 66243072 is about 404.6195115740.

It can be divided in two parts, 662 and 43072, that added together give a palindrome (43734).

The spelling of 66243072 in words is "sixty-six million, two hundred forty-three thousand, seventy-two".