65828081 has 4 divisors (see below), whose sum is σ = 71812464. Its totient is φ = 59843700.

The previous prime is 65828053. The next prime is 65828099. The reversal of 65828081 is 18082856.

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 65828081 - 2¹⁸ = 65565937 is a prime.

It is a super-2 number, since 2×65828081² = 8666672496285122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65828041) 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, 2992175 + ... + 2992196.

It is an arithmetic number, because the mean of its divisors is an integer number (17953116).

Almost surely, 2^65828081 is an apocalyptic number.

It is an amenable number.

65828081 is a deficient number, since it is larger than the sum of its proper divisors (5984383).

65828081 is a wasteful number, since it uses less digits than its factorization.

65828081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5984382.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 65828081 is about 8113.4506222692. The cubic root of 65828081 is about 403.7728050585.

The spelling of 65828081 in words is "sixty-five million, eight hundred twenty-eight thousand, eighty-one".