66303217 has 8 divisors (see below), whose sum is σ = 69920000. Its totient is φ = 62699184.

The previous prime is 66303187. The next prime is 66303233. The reversal of 66303217 is 71230366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66303217 - 2²³ = 57914609 is a prime.

It is a super-2 number, since 2×66303217² = 8792233169098178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66303277) 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 in 7 ways as a sum of consecutive naturals, for example, 8659 + ... + 14407.

It is an arithmetic number, because the mean of its divisors is an integer number (8740000).

Almost surely, 2^66303217 is an apocalyptic number.

It is an amenable number.

66303217 is a deficient number, since it is larger than the sum of its proper divisors (3616783).

66303217 is a wasteful number, since it uses less digits than its factorization.

66303217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6375.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 66303217 is about 8142.6787361408. The cubic root of 66303217 is about 404.7419318177.

The spelling of 66303217 in words is "sixty-six million, three hundred three thousand, two hundred seventeen".