65857677425 has 12 divisors (see below), whose sum is σ = 86467257036. Its totient is φ = 49586956800.

The previous prime is 65857677401. The next prime is 65857677433. The reversal of 65857677425 is 52477675856.

It can be written as a sum of positive squares in 6 ways, for example, as 524272609 + 65333404816 = 22897^2 + 255604^2 .

It is not a de Polignac number, because 65857677425 - 2¹⁶ = 65857611889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 77479196 + ... + 77480045.

It is an arithmetic number, because the mean of its divisors is an integer number (7205604753).

Almost surely, 2^65857677425 is an apocalyptic number.

It is an amenable number.

65857677425 is a deficient number, since it is larger than the sum of its proper divisors (20609579611).

65857677425 is a wasteful number, since it uses less digits than its factorization.

65857677425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154959268 (or 154959263 counting only the distinct ones).

The product of its digits is 98784000, while the sum is 62.

The spelling of 65857677425 in words is "sixty-five billion, eight hundred fifty-seven million, six hundred seventy-seven thousand, four hundred twenty-five".