65984515 has 4 divisors (see below), whose sum is σ = 79181424. Its totient is φ = 52787608.

The previous prime is 65984509. The next prime is 65984521. The reversal of 65984515 is 51548956.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (65984509) and next prime (65984521).

It is a cyclic number.

It is not a de Polignac number, because 65984515 - 2³ = 65984507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6598447 + ... + 6598456.

It is an arithmetic number, because the mean of its divisors is an integer number (19795356).

Almost surely, 2^65984515 is an apocalyptic number.

65984515 is a deficient number, since it is larger than the sum of its proper divisors (13196909).

65984515 is a wasteful number, since it uses less digits than its factorization.

65984515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13196908.

The product of its digits is 216000, while the sum is 43.

The square root of 65984515 is about 8123.0853128599. The cubic root of 65984515 is about 404.0923942357.

The spelling of 65984515 in words is "sixty-five million, nine hundred eighty-four thousand, five hundred fifteen".