66203072 has 56 divisors (see below), whose sum is σ = 144572736. Its totient is φ = 29887488.

The previous prime is 66203063. The next prime is 66203129. The reversal of 66203072 is 27030266.

66203072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 38258 + ... + 39950.

It is an arithmetic number, because the mean of its divisors is an integer number (2581656).

Almost surely, 2^66203072 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 66203072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72286368).

66203072 is an abundant number, since it is smaller than the sum of its proper divisors (78369664).

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

66203072 is a wasteful number, since it uses less digits than its factorization.

66203072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 66203072 is about 8136.5270232452. The cubic root of 66203072 is about 404.5380538018.

The spelling of 66203072 in words is "sixty-six million, two hundred three thousand, seventy-two".