65775893 has 4 divisors (see below), whose sum is σ = 67897728. Its totient is φ = 63654060.

The previous prime is 65775881. The next prime is 65775911. The reversal of 65775893 is 39857756.

It is a happy number.

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 65775893 - 2¹⁰ = 65774869 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 (65775803) 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, 1060871 + ... + 1060932.

It is an arithmetic number, because the mean of its divisors is an integer number (16974432).

Almost surely, 2^65775893 is an apocalyptic number.

It is an amenable number.

65775893 is a deficient number, since it is larger than the sum of its proper divisors (2121835).

65775893 is a wasteful number, since it uses less digits than its factorization.

65775893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121834.

The product of its digits is 1587600, while the sum is 50.

The square root of 65775893 is about 8110.2338437310. The cubic root of 65775893 is about 403.6660741827. Note that the first 3 decimals are identical.

The spelling of 65775893 in words is "sixty-five million, seven hundred seventy-five thousand, eight hundred ninety-three".