65707154940025 has 27 divisors (see below), whose sum is σ = 82714513561869. Its totient is φ = 51779020925280.

The previous prime is 65707154940023. The next prime is 65707154940083. The reversal of 65707154940025 is 52004945170756.

The square root of 65707154940025 is 8105995.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 11018290223161 + 54688864716864 = 3319381^2 + 7395192^2 .

It is not a de Polignac number, because 65707154940025 - 2¹ = 65707154940023 is a prime.

It is a super-2 number, since 2×65707154940025² (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 (65707154940023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2715496227 + ... + 2715520423.

Almost surely, 2^{65707154940025} is an apocalyptic number.

65707154940025 is the 8105995-th square number.

65707154940025 is the 4052998-th centered octagonal number.

It is an amenable number.

65707154940025 is a deficient number, since it is larger than the sum of its proper divisors (17007358621844).

65707154940025 is an frugal number, since it uses more digits than its factorization.

65707154940025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48538 (or 24269 counting only the distinct ones).

The product of its (nonzero) digits is 10584000, while the sum is 55.

The spelling of 65707154940025 in words is "sixty-five trillion, seven hundred seven billion, one hundred fifty-four million, nine hundred forty thousand, twenty-five".