66203040 has 96 divisors (see below), whose sum is σ = 210651840. Its totient is φ = 17475584.

The previous prime is 66203029. The next prime is 66203047. The reversal of 66203040 is 4030266.

66203040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 66202998 and 66203016.

It is not an unprimeable number, because it can be changed into a prime (66203047) 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 15 ways as a sum of consecutive naturals, for example, 50716 + ... + 52004.

It is an arithmetic number, because the mean of its divisors is an integer number (2194290).

Almost surely, 2^66203040 is an apocalyptic number.

66203040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66203040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105325920).

66203040 is an abundant number, since it is smaller than the sum of its proper divisors (144448800).

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

66203040 is a wasteful number, since it uses less digits than its factorization.

66203040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414 (or 1406 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 66203040 is about 8136.5250568040. The cubic root of 66203040 is about 404.5379886224.

The spelling of 66203040 in words is "sixty-six million, two hundred three thousand, forty".