65725606121 has 16 divisors (see below), whose sum is σ = 77155418880. Its totient is φ = 54806310720.

The previous prime is 65725606117. The next prime is 65725606123. The reversal of 65725606121 is 12160652756.

It is not a de Polignac number, because 65725606121 - 2² = 65725606117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65725606123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2878811 + ... + 2901551.

It is an arithmetic number, because the mean of its divisors is an integer number (4822213680).

Almost surely, 2^65725606121 is an apocalyptic number.

It is an amenable number.

65725606121 is a deficient number, since it is larger than the sum of its proper divisors (11429812759).

65725606121 is a wasteful number, since it uses less digits than its factorization.

65725606121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33944.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 65725606121 in words is "sixty-five billion, seven hundred twenty-five million, six hundred six thousand, one hundred twenty-one".