66503236 has 6 divisors (see below), whose sum is σ = 116380670. Its totient is φ = 33251616.

The previous prime is 66503233. The next prime is 66503251. The reversal of 66503236 is 63230566.

66503236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 60933636 + 5569600 = 7806^2 + 2360^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66503198 and 66503207.

It is not an unprimeable number, because it can be changed into a prime (66503233) 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 as a sum of consecutive naturals, namely, 8312901 + ... + 8312908.

Almost surely, 2^66503236 is an apocalyptic number.

It is an amenable number.

66503236 is a deficient number, since it is larger than the sum of its proper divisors (49877434).

66503236 is a wasteful number, since it uses less digits than its factorization.

66503236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16625813 (or 16625811 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 66503236 is about 8154.9516246266. The cubic root of 66503236 is about 405.1485224714.

The spelling of 66503236 in words is "sixty-six million, five hundred three thousand, two hundred thirty-six".