65665262222121 has 8 divisors (see below), whose sum is σ = 87555110023840. Its totient is φ = 43776127950912.

The previous prime is 65665262222107. The next prime is 65665262222179. The reversal of 65665262222121 is 12122226256656.

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

It is not a de Polignac number, because 65665262222121 - 2²³ = 65665253833513 is a prime.

It is a super-2 number, since 2×65665262222121² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65665262226121) 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, 178167856 + ... + 178536033.

It is an arithmetic number, because the mean of its divisors is an integer number (10944388752980).

Almost surely, 2^{65665262222121} is an apocalyptic number.

It is an amenable number.

65665262222121 is a deficient number, since it is larger than the sum of its proper divisors (21889847801719).

65665262222121 is a wasteful number, since it uses less digits than its factorization.

65665262222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356765255.

The product of its digits is 2073600, while the sum is 48.

Adding to 65665262222121 its reverse (12122226256656), we get a palindrome (77787488478777).

The spelling of 65665262222121 in words is "sixty-five trillion, six hundred sixty-five billion, two hundred sixty-two million, two hundred twenty-two thousand, one hundred twenty-one".