65688481 has 8 divisors (see below), whose sum is σ = 66830400. Its totient is φ = 64556400.

The previous prime is 65688449. The next prime is 65688499. The reversal of 65688481 is 18488656.

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 65688481 - 2⁵ = 65688449 is a prime.

It is a super-2 number, since 2×65688481² = 8629953072174722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65688781) 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, 11700 + ... + 16378.

It is an arithmetic number, because the mean of its divisors is an integer number (8353800).

Almost surely, 2^65688481 is an apocalyptic number.

It is an amenable number.

65688481 is a deficient number, since it is larger than the sum of its proper divisors (1141919).

65688481 is a wasteful number, since it uses less digits than its factorization.

65688481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4919.

The product of its digits is 368640, while the sum is 46.

The square root of 65688481 is about 8104.8430583201. The cubic root of 65688481 is about 403.4871793554.

The spelling of 65688481 in words is "sixty-five million, six hundred eighty-eight thousand, four hundred eighty-one".