65673637 has 4 divisors (see below), whose sum is σ = 66750316. Its totient is φ = 64596960.

The previous prime is 65673623. The next prime is 65673649. The reversal of 65673637 is 73637656.

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 3437316 + 62236321 = 1854^2 + 7889^2 .

It is a cyclic number.

It is not a de Polignac number, because 65673637 - 2¹¹ = 65671589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65673593 and 65673602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65673607) 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, 538248 + ... + 538369.

It is an arithmetic number, because the mean of its divisors is an integer number (16687579).

Almost surely, 2^65673637 is an apocalyptic number.

It is an amenable number.

65673637 is a deficient number, since it is larger than the sum of its proper divisors (1076679).

65673637 is a wasteful number, since it uses less digits than its factorization.

65673637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076678.

The product of its digits is 476280, while the sum is 43.

The square root of 65673637 is about 8103.9272578177. The cubic root of 65673637 is about 403.4567843008.

The spelling of 65673637 in words is "sixty-five million, six hundred seventy-three thousand, six hundred thirty-seven".