65819873 has 8 divisors (see below), whose sum is σ = 75926592. Its totient is φ = 55889136.

The previous prime is 65819849. The next prime is 65819899. The reversal of 65819873 is 37891856.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 65819873 - 2¹² = 65815777 is a prime.

It is a super-2 number, since 2×65819873² = 8664511363472258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65819573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43190 + ... + 44687.

It is an arithmetic number, because the mean of its divisors is an integer number (9490824).

Almost surely, 2^65819873 is an apocalyptic number.

It is an amenable number.

65819873 is a deficient number, since it is larger than the sum of its proper divisors (10106719).

65819873 is a wasteful number, since it uses less digits than its factorization.

65819873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87991.

The product of its digits is 362880, while the sum is 47.

The square root of 65819873 is about 8112.9447797948. The cubic root of 65819873 is about 403.7560224287.

The spelling of 65819873 in words is "sixty-five million, eight hundred nineteen thousand, eight hundred seventy-three".