65583421 has 4 divisors (see below), whose sum is σ = 69035200. Its totient is φ = 62131644.

The previous prime is 65583409. The next prime is 65583437. The reversal of 65583421 is 12438556.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65583421 is a prime.

It is a super-2 number, since 2×65583421² = 8602370220126482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65583461) 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, 1725861 + ... + 1725898.

It is an arithmetic number, because the mean of its divisors is an integer number (17258800).

Almost surely, 2^65583421 is an apocalyptic number.

It is an amenable number.

65583421 is a deficient number, since it is larger than the sum of its proper divisors (3451779).

65583421 is a wasteful number, since it uses less digits than its factorization.

65583421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451778.

The product of its digits is 28800, while the sum is 34.

The square root of 65583421 is about 8098.3591547918. The cubic root of 65583421 is about 403.2719565250.

The spelling of 65583421 in words is "sixty-five million, five hundred eighty-three thousand, four hundred twenty-one".