65396681 has 16 divisors (see below), whose sum is σ = 77027328. Its totient is φ = 54355200.

The previous prime is 65396629. The next prime is 65396687. The reversal of 65396681 is 18669356.

It is a cyclic number.

It is not a de Polignac number, because 65396681 - 2¹⁰ = 65395657 is a prime.

It is a super-2 number, since 2×65396681² = 8553451771631522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65396687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54221 + ... + 55413.

It is an arithmetic number, because the mean of its divisors is an integer number (4814208).

Almost surely, 2^65396681 is an apocalyptic number.

It is an amenable number.

65396681 is a deficient number, since it is larger than the sum of its proper divisors (11630647).

65396681 is a wasteful number, since it uses less digits than its factorization.

65396681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432.

The product of its digits is 233280, while the sum is 44.

The square root of 65396681 is about 8086.8214398489. The cubic root of 65396681 is about 402.8888383892. Note that the first 4 decimals are identical.

The spelling of 65396681 in words is "sixty-five million, three hundred ninety-six thousand, six hundred eighty-one".