65821942 has 8 divisors (see below), whose sum is σ = 99396000. Its totient is φ = 32689944.

The previous prime is 65821901. The next prime is 65821963. The reversal of 65821942 is 24912856.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110142 + ... + 110737.

It is an arithmetic number, because the mean of its divisors is an integer number (12424500).

Almost surely, 2^65821942 is an apocalyptic number.

65821942 is a deficient number, since it is larger than the sum of its proper divisors (33574058).

65821942 is a wasteful number, since it uses less digits than its factorization.

65821942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221030.

The product of its digits is 34560, while the sum is 37.

The square root of 65821942 is about 8113.0722910621. The cubic root of 65821942 is about 403.7602529770.

The spelling of 65821942 in words is "sixty-five million, eight hundred twenty-one thousand, nine hundred forty-two".