65640101 has 8 divisors (see below), whose sum is σ = 66773280. Its totient is φ = 64511568.

The previous prime is 65640089. The next prime is 65640143. The reversal of 65640101 is 10104656.

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 65640101 - 2¹⁴ = 65623717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65640151) 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, 38495 + ... + 40163.

It is an arithmetic number, because the mean of its divisors is an integer number (8346660).

Almost surely, 2^65640101 is an apocalyptic number.

It is an amenable number.

65640101 is a deficient number, since it is larger than the sum of its proper divisors (1133179).

65640101 is a wasteful number, since it uses less digits than its factorization.

65640101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 65640101 is about 8101.8578733523. The cubic root of 65640101 is about 403.3880980362.

Adding to 65640101 its reverse (10104656), we get a palindrome (75744757).

The spelling of 65640101 in words is "sixty-five million, six hundred forty thousand, one hundred one".