66703216 has 10 divisors (see below), whose sum is σ = 129237512. Its totient is φ = 33351600.

The previous prime is 66703213. The next prime is 66703229. The reversal of 66703216 is 61230766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66703211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2084460 + ... + 2084491.

Almost surely, 2^66703216 is an apocalyptic number.

It is an amenable number.

66703216 is a deficient number, since it is larger than the sum of its proper divisors (62534296).

66703216 is a wasteful number, since it uses less digits than its factorization.

66703216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168959 (or 4168953 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 66703216 is about 8167.2036830240. The cubic root of 66703216 is about 405.5542196435.

The spelling of 66703216 in words is "sixty-six million, seven hundred three thousand, two hundred sixteen".