65389681 has 8 divisors (see below), whose sum is σ = 74799360. Its totient is φ = 55997088.

The previous prime is 65389673. The next prime is 65389691. The reversal of 65389681 is 18698356.

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

It is not a de Polignac number, because 65389681 - 2³ = 65389673 is a prime.

It is a super-2 number, since 2×65389681² = 8551620762563522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65389601) 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, 5400 + ... + 12646.

It is an arithmetic number, because the mean of its divisors is an integer number (9349920).

Almost surely, 2^65389681 is an apocalyptic number.

It is an amenable number.

65389681 is a deficient number, since it is larger than the sum of its proper divisors (9409679).

65389681 is a wasteful number, since it uses less digits than its factorization.

65389681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543.

The product of its digits is 311040, while the sum is 46.

The square root of 65389681 is about 8086.3886253383. The cubic root of 65389681 is about 402.8744629273.

The spelling of 65389681 in words is "sixty-five million, three hundred eighty-nine thousand, six hundred eighty-one".