65515897 has 8 divisors (see below), whose sum is σ = 66920256. Its totient is φ = 64117872.

The previous prime is 65515873. The next prime is 65515903. The reversal of 65515897 is 79851556.

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

It is a cyclic number.

It is not a de Polignac number, because 65515897 - 2¹¹ = 65513849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65515817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23428 + ... + 26074.

It is an arithmetic number, because the mean of its divisors is an integer number (8365032).

Almost surely, 2^65515897 is an apocalyptic number.

It is an amenable number.

65515897 is a deficient number, since it is larger than the sum of its proper divisors (1404359).

65515897 is a wasteful number, since it uses less digits than its factorization.

65515897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3167.

The product of its digits is 378000, while the sum is 46.

The square root of 65515897 is about 8094.1890884758. The cubic root of 65515897 is about 403.1335074783.

The spelling of 65515897 in words is "sixty-five million, five hundred fifteen thousand, eight hundred ninety-seven".