65387785 has 4 divisors (see below), whose sum is σ = 78465348. Its totient is φ = 52310224.

The previous prime is 65387767. The next prime is 65387801. The reversal of 65387785 is 58778356.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42653961 + 22733824 = 6531^2 + 4768^2 .

It is a cyclic number.

It is not a de Polignac number, because 65387785 - 2⁷ = 65387657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6538774 + ... + 6538783.

It is an arithmetic number, because the mean of its divisors is an integer number (19616337).

Almost surely, 2^65387785 is an apocalyptic number.

It is an amenable number.

65387785 is a deficient number, since it is larger than the sum of its proper divisors (13077563).

65387785 is a wasteful number, since it uses less digits than its factorization.

65387785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13077562.

The product of its digits is 1411200, while the sum is 49.

The square root of 65387785 is about 8086.2713904494. The cubic root of 65387785 is about 402.8705690542.

The spelling of 65387785 in words is "sixty-five million, three hundred eighty-seven thousand, seven hundred eighty-five".