65727987140 has 12 divisors (see below), whose sum is σ = 138028773036. Its totient is φ = 26291194848.

The previous prime is 65727987137. The next prime is 65727987173. The reversal of 65727987140 is 4178972756.

It can be written as a sum of positive squares in 2 ways, for example, as 42463196356 + 23264790784 = 206066^2 + 152528^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1643199659 + ... + 1643199698.

It is an arithmetic number, because the mean of its divisors is an integer number (11502397753).

Almost surely, 2^65727987140 is an apocalyptic number.

It is an amenable number.

65727987140 is an abundant number, since it is smaller than the sum of its proper divisors (72300785896).

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

65727987140 is a wasteful number, since it uses less digits than its factorization.

65727987140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286399366 (or 3286399364 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 65727987140 in words is "sixty-five billion, seven hundred twenty-seven million, nine hundred eighty-seven thousand, one hundred forty".