65405487 has 16 divisors (see below), whose sum is σ = 100339200. Its totient is φ = 37121952.

The previous prime is 65405449. The next prime is 65405489. The reversal of 65405487 is 78450456.

65405487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65405487 - 2⁶ = 65405423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65405489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7323 + ... + 13580.

It is an arithmetic number, because the mean of its divisors is an integer number (6271200).

Almost surely, 2^65405487 is an apocalyptic number.

65405487 is a deficient number, since it is larger than the sum of its proper divisors (34933713).

65405487 is a wasteful number, since it uses less digits than its factorization.

65405487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21062.

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 65405487 is about 8087.3658876052. The cubic root of 65405487 is about 402.9069212635.

The spelling of 65405487 in words is "sixty-five million, four hundred five thousand, four hundred eighty-seven".