65388887 has 4 divisors (see below), whose sum is σ = 65669760. Its totient is φ = 65108016.

The previous prime is 65388863. The next prime is 65388913. The reversal of 65388887 is 78888356.

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 65388887 - 2¹⁰ = 65387863 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 (65388487) 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, 140087 + ... + 140552.

It is an arithmetic number, because the mean of its divisors is an integer number (16417440).

Almost surely, 2^65388887 is an apocalyptic number.

65388887 is a deficient number, since it is larger than the sum of its proper divisors (280873).

65388887 is a wasteful number, since it uses less digits than its factorization.

65388887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280872.

The product of its digits is 2580480, while the sum is 53.

The square root of 65388887 is about 8086.3395303438. The cubic root of 65388887 is about 402.8728322744.

The spelling of 65388887 in words is "sixty-five million, three hundred eighty-eight thousand, eight hundred eighty-seven".