65918427 has 4 divisors (see below), whose sum is σ = 87891240. Its totient is φ = 43945616.

The previous prime is 65918417. The next prime is 65918449. The reversal of 65918427 is 72481956.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65918427 - 2¹¹ = 65916379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65918417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10986402 + ... + 10986407.

It is an arithmetic number, because the mean of its divisors is an integer number (21972810).

Almost surely, 2^65918427 is an apocalyptic number.

65918427 is a deficient number, since it is larger than the sum of its proper divisors (21972813).

65918427 is a wasteful number, since it uses less digits than its factorization.

65918427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21972812.

The product of its digits is 120960, while the sum is 42.

The square root of 65918427 is about 8119.0163813112. The cubic root of 65918427 is about 403.9574404567.

The spelling of 65918427 in words is "sixty-five million, nine hundred eighteen thousand, four hundred twenty-seven".