65116649 has 4 divisors (see below), whose sum is σ = 70125636. Its totient is φ = 60107664.

The previous prime is 65116643. The next prime is 65116661. The reversal of 65116649 is 94661156.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8761600 + 56355049 = 2960^2 + 7507^2 .

It is a cyclic number.

It is not a de Polignac number, because 65116649 - 2⁸ = 65116393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65116643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2504474 + ... + 2504499.

It is an arithmetic number, because the mean of its divisors is an integer number (17531409).

Almost surely, 2^65116649 is an apocalyptic number.

It is an amenable number.

65116649 is a deficient number, since it is larger than the sum of its proper divisors (5008987).

65116649 is a wasteful number, since it uses less digits than its factorization.

65116649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008986.

The product of its digits is 38880, while the sum is 38.

The square root of 65116649 is about 8069.4887694327. The cubic root of 65116649 is about 402.3129519381.

The spelling of 65116649 in words is "sixty-five million, one hundred sixteen thousand, six hundred forty-nine".