65750961861 has 12 divisors (see below), whose sum is σ = 102279274188. Its totient is φ = 40462130304.

The previous prime is 65750961733. The next prime is 65750961883. The reversal of 65750961861 is 16816905756.

65750961861 is a `hidden beast` number, since 6 + 57 + 509 + 6 + 1 + 86 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 35681321025 + 30069640836 = 188895^2 + 173406^2 .

It is not a de Polignac number, because 65750961861 - 2⁷ = 65750961733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65750961798 and 65750961807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65750968861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280986900 + ... + 280987133.

It is an arithmetic number, because the mean of its divisors is an integer number (8523272849).

Almost surely, 2^65750961861 is an apocalyptic number.

It is an amenable number.

65750961861 is a deficient number, since it is larger than the sum of its proper divisors (36528312327).

65750961861 is a wasteful number, since it uses less digits than its factorization.

65750961861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561974052 (or 561974049 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 65750961861 in words is "sixty-five billion, seven hundred fifty million, nine hundred sixty-one thousand, eight hundred sixty-one".