65505775 has 6 divisors (see below), whose sum is σ = 81227192. Its totient is φ = 52404600.

The previous prime is 65505767. The next prime is 65505779. The reversal of 65505775 is 57750556.

It is not a de Polignac number, because 65505775 - 2³ = 65505767 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 (65505779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1310091 + ... + 1310140.

Almost surely, 2^65505775 is an apocalyptic number.

65505775 is a deficient number, since it is larger than the sum of its proper divisors (15721417).

65505775 is a wasteful number, since it uses less digits than its factorization.

65505775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620241 (or 2620236 counting only the distinct ones).

The product of its (nonzero) digits is 183750, while the sum is 40.

The square root of 65505775 is about 8093.5638009470. The cubic root of 65505775 is about 403.1127454561.

The spelling of 65505775 in words is "sixty-five million, five hundred five thousand, seven hundred seventy-five".