65116921 has 8 divisors (see below), whose sum is σ = 66956384. Its totient is φ = 63292320.

The previous prime is 65116901. The next prime is 65116937. The reversal of 65116921 is 12961156.

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 65116921 - 2⁵ = 65116889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65116901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5485 + ... + 12661.

It is an arithmetic number, because the mean of its divisors is an integer number (8369548).

Almost surely, 2^65116921 is an apocalyptic number.

It is an amenable number.

65116921 is a deficient number, since it is larger than the sum of its proper divisors (1839463).

65116921 is a wasteful number, since it uses less digits than its factorization.

65116921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7431.

The product of its digits is 3240, while the sum is 31.

The square root of 65116921 is about 8069.5056230230. The cubic root of 65116921 is about 402.3135121070.

The spelling of 65116921 in words is "sixty-five million, one hundred sixteen thousand, nine hundred twenty-one".