66503116 has 24 divisors (see below), whose sum is σ = 129714480. Its totient is φ = 29647872.

The previous prime is 66503077. The next prime is 66503117. The reversal of 66503116 is 61130566.

It is a super-4 number, since 4×66503116⁴ (a number of 32 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (66503117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24445 + ... + 27028.

It is an arithmetic number, because the mean of its divisors is an integer number (5404770).

Almost surely, 2^66503116 is an apocalyptic number.

It is an amenable number.

66503116 is a deficient number, since it is larger than the sum of its proper divisors (63211364).

66503116 is a wasteful number, since it uses less digits than its factorization.

66503116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51513 (or 51511 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 66503116 is about 8154.9442671302. The cubic root of 66503116 is about 405.1482787848.

The spelling of 66503116 in words is "sixty-six million, five hundred three thousand, one hundred sixteen".