65662217 has 8 divisors (see below), whose sum is σ = 68678016. Its totient is φ = 62659872.

The previous prime is 65662189. The next prime is 65662231. The reversal of 65662217 is 71226656.

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 65662217 - 2¹⁸ = 65400073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65662237) 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, 7388 + ... + 13634.

It is an arithmetic number, because the mean of its divisors is an integer number (8584752).

Almost surely, 2^65662217 is an apocalyptic number.

It is an amenable number.

65662217 is a deficient number, since it is larger than the sum of its proper divisors (3015799).

65662217 is a wasteful number, since it uses less digits than its factorization.

65662217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6727.

The product of its digits is 30240, while the sum is 35.

The square root of 65662217 is about 8103.2226305341. Note that the first 3 decimals coincide. The cubic root of 65662217 is about 403.4333972221.

The spelling of 65662217 in words is "sixty-five million, six hundred sixty-two thousand, two hundred seventeen".