65506405 has 16 divisors (see below), whose sum is σ = 79994880. Its totient is φ = 51487488.

The previous prime is 65506387. The next prime is 65506409. The reversal of 65506405 is 50460556.

It is a cyclic number.

It is not a de Polignac number, because 65506405 - 2¹¹ = 65504357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65506409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151069 + ... + 151501.

It is an arithmetic number, because the mean of its divisors is an integer number (4999680).

Almost surely, 2^65506405 is an apocalyptic number.

It is an amenable number.

65506405 is a deficient number, since it is larger than the sum of its proper divisors (14488475).

65506405 is a wasteful number, since it uses less digits than its factorization.

65506405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 65506405 is about 8093.6027206677. The cubic root of 65506405 is about 403.1140377605.

The spelling of 65506405 in words is "sixty-five million, five hundred six thousand, four hundred five".