65994891 has 8 divisors (see below), whose sum is σ = 88226880. Its totient is φ = 43879752.

The previous prime is 65994883. The next prime is 65994919. The reversal of 65994891 is 19849956.

65994891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 65994891 - 2³ = 65994883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65994491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27885 + ... + 30158.

It is an arithmetic number, because the mean of its divisors is an integer number (11028360).

Almost surely, 2^65994891 is an apocalyptic number.

65994891 is a deficient number, since it is larger than the sum of its proper divisors (22231989).

65994891 is a wasteful number, since it uses less digits than its factorization.

65994891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58425.

The product of its digits is 699840, while the sum is 51.

The square root of 65994891 is about 8123.7239613369. The cubic root of 65994891 is about 404.1135741693.

The spelling of 65994891 in words is "sixty-five million, nine hundred ninety-four thousand, eight hundred ninety-one".