65959421 has 4 divisors (see below), whose sum is σ = 71955744. Its totient is φ = 59963100.

The previous prime is 65959409. The next prime is 65959451. The reversal of 65959421 is 12495956.

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 not a de Polignac number, because 65959421 - 2⁶ = 65959357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65959451) 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, 2998145 + ... + 2998166.

It is an arithmetic number, because the mean of its divisors is an integer number (17988936).

Almost surely, 2^65959421 is an apocalyptic number.

It is an amenable number.

65959421 is a deficient number, since it is larger than the sum of its proper divisors (5996323).

65959421 is a wasteful number, since it uses less digits than its factorization.

65959421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996322.

The product of its digits is 97200, while the sum is 41.

The square root of 65959421 is about 8121.5405558305. The cubic root of 65959421 is about 404.0411621132.

The spelling of 65959421 in words is "sixty-five million, nine hundred fifty-nine thousand, four hundred twenty-one".