65009885 has 16 divisors (see below), whose sum is σ = 79252992. Its totient is φ = 51187200.

The previous prime is 65009881. The next prime is 65009897. The reversal of 65009885 is 58890056.

It is not a de Polignac number, because 65009885 - 2² = 65009881 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 (65009881) 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, 150620 + ... + 151050.

It is an arithmetic number, because the mean of its divisors is an integer number (4953312).

Almost surely, 2^65009885 is an apocalyptic number.

It is an amenable number.

65009885 is a deficient number, since it is larger than the sum of its proper divisors (14243107).

65009885 is a wasteful number, since it uses less digits than its factorization.

65009885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 65009885 is about 8062.8707666687. The cubic root of 65009885 is about 402.0929568125.

The spelling of 65009885 in words is "sixty-five million, nine thousand, eight hundred eighty-five".