65611985 has 8 divisors (see below), whose sum is σ = 82157760. Its totient is φ = 50207344.

The previous prime is 65611979. The next prime is 65612003. The reversal of 65611985 is 58911656.

65611985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65611985 - 2⁴ = 65611969 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 285155 + ... + 285384.

It is an arithmetic number, because the mean of its divisors is an integer number (10269720).

Almost surely, 2^65611985 is an apocalyptic number.

It is an amenable number.

65611985 is a deficient number, since it is larger than the sum of its proper divisors (16545775).

65611985 is a wasteful number, since it uses less digits than its factorization.

65611985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570567.

The product of its digits is 64800, while the sum is 41.

The square root of 65611985 is about 8100.1225299374. The cubic root of 65611985 is about 403.3304946335.

The spelling of 65611985 in words is "sixty-five million, six hundred eleven thousand, nine hundred eighty-five".