65631017 has 4 divisors (see below), whose sum is σ = 65651460. Its totient is φ = 65610576.

The previous prime is 65630993. The next prime is 65631019. The reversal of 65631017 is 71013656.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47831056 + 17799961 = 6916^2 + 4219^2 .

It is a cyclic number.

It is not a de Polignac number, because 65631017 - 2¹² = 65626921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65631019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4238 + ... + 12215.

It is an arithmetic number, because the mean of its divisors is an integer number (16412865).

Almost surely, 2^65631017 is an apocalyptic number.

It is an amenable number.

65631017 is a deficient number, since it is larger than the sum of its proper divisors (20443).

65631017 is a wasteful number, since it uses less digits than its factorization.

65631017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20442.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 65631017 is about 8101.2972418002. The cubic root of 65631017 is about 403.3694887486.

The spelling of 65631017 in words is "sixty-five million, six hundred thirty-one thousand, seventeen".