65874821 has 4 divisors (see below), whose sum is σ = 65892000. Its totient is φ = 65857644.

The previous prime is 65874811. The next prime is 65874841. The reversal of 65874821 is 12847856.

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-65874821 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 (65874811) 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, 80 + ... + 11478.

It is an arithmetic number, because the mean of its divisors is an integer number (16473000).

Almost surely, 2^65874821 is an apocalyptic number.

It is an amenable number.

65874821 is a deficient number, since it is larger than the sum of its proper divisors (17179).

65874821 is a wasteful number, since it uses less digits than its factorization.

65874821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17178.

The product of its digits is 107520, while the sum is 41.

The square root of 65874821 is about 8116.3305132307. The cubic root of 65874821 is about 403.8683462304.

The spelling of 65874821 in words is "sixty-five million, eight hundred seventy-four thousand, eight hundred twenty-one".