65807699040 has 144 divisors (see below), whose sum is σ = 237778789248. Its totient is φ = 16516435968.

The previous prime is 65807698993. The next prime is 65807699051. The reversal of 65807699040 is 4099670856.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1319632 + ... + 1368591.

It is an arithmetic number, because the mean of its divisors is an integer number (1651241592).

Almost surely, 2^65807699040 is an apocalyptic number.

65807699040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65807699040 is an abundant number, since it is smaller than the sum of its proper divisors (171971090208).

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

65807699040 is a wasteful number, since it uses less digits than its factorization.

65807699040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688261 (or 2688250 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 65807699040 in words is "sixty-five billion, eight hundred seven million, six hundred ninety-nine thousand, forty".