65879561 has 8 divisors (see below), whose sum is σ = 74347200. Its totient is φ = 57825040.

The previous prime is 65879537. The next prime is 65879603. The reversal of 65879561 is 16597856.

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 65879561 - 2¹⁸ = 65617417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65879161) 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, 102941 + ... + 103578.

It is an arithmetic number, because the mean of its divisors is an integer number (9293400).

Almost surely, 2^65879561 is an apocalyptic number.

It is an amenable number.

65879561 is a deficient number, since it is larger than the sum of its proper divisors (8467639).

65879561 is a wasteful number, since it uses less digits than its factorization.

65879561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206559.

The product of its digits is 453600, while the sum is 47.

The square root of 65879561 is about 8116.6225118580. The cubic root of 65879561 is about 403.8780327339.

It can be divided in two parts, 658795 and 61, that added together give a palindrome (658856).

The spelling of 65879561 in words is "sixty-five million, eight hundred seventy-nine thousand, five hundred sixty-one".