65561673 has 12 divisors (see below), whose sum is σ = 92861360. Its totient is φ = 41136192.

The previous prime is 65561653. The next prime is 65561681. The reversal of 65561673 is 37616556.

It is not a de Polignac number, because 65561673 - 2¹⁴ = 65545289 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65561603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36943 + ... + 38676.

Almost surely, 2^65561673 is an apocalyptic number.

It is an amenable number.

65561673 is a deficient number, since it is larger than the sum of its proper divisors (27299687).

65561673 is a wasteful number, since it uses less digits than its factorization.

65561673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75656 (or 75639 counting only the distinct ones).

The product of its digits is 113400, while the sum is 39.

The square root of 65561673 is about 8097.0163023178. The cubic root of 65561673 is about 403.2273755014.

The spelling of 65561673 in words is "sixty-five million, five hundred sixty-one thousand, six hundred seventy-three".