65690217 has 16 divisors (see below), whose sum is σ = 98774080. Its totient is φ = 43138656.

The previous prime is 65690203. The next prime is 65690221. The reversal of 65690217 is 71209656.

It is not a de Polignac number, because 65690217 - 2⁷ = 65690089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65690237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16348 + ... + 19965.

It is an arithmetic number, because the mean of its divisors is an integer number (6173380).

Almost surely, 2^65690217 is an apocalyptic number.

65690217 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

65690217 is a deficient number, since it is larger than the sum of its proper divisors (33083863).

65690217 is a wasteful number, since it uses less digits than its factorization.

65690217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36389 (or 36383 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 65690217 is about 8104.9501540725. The cubic root of 65690217 is about 403.4907337461.

The spelling of 65690217 in words is "sixty-five million, six hundred ninety thousand, two hundred seventeen".