65701665140 has 24 divisors (see below), whose sum is σ = 142731204840. Its totient is φ = 25374435968.

The previous prime is 65701665137. The next prime is 65701665181. The reversal of 65701665140 is 4156610756.

It can be written as a sum of positive squares in 4 ways, for example, as 28002006244 + 37699658896 = 167338^2 + 194164^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56638787 + ... + 56639946.

It is an arithmetic number, because the mean of its divisors is an integer number (5947133535).

Almost surely, 2^65701665140 is an apocalyptic number.

It is an amenable number.

65701665140 is an abundant number, since it is smaller than the sum of its proper divisors (77029539700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65701665140 is a wasteful number, since it uses less digits than its factorization.

65701665140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113278771 (or 113278769 counting only the distinct ones).

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

The spelling of 65701665140 in words is "sixty-five billion, seven hundred one million, six hundred sixty-five thousand, one hundred forty".