65899892680 has 16 divisors (see below), whose sum is σ = 148274758620. Its totient is φ = 26359957056.

The previous prime is 65899892677. The next prime is 65899892687. The reversal of 65899892680 is 8629899856.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65873328964 + 26563716 = 256658^2 + 5154^2 .

It is not an unprimeable number, because it can be changed into a prime (65899892687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823748619 + ... + 823748698.

Almost surely, 2^65899892680 is an apocalyptic number.

It is an amenable number.

65899892680 is an abundant number, since it is smaller than the sum of its proper divisors (82374865940).

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

65899892680 is a wasteful number, since it uses less digits than its factorization.

65899892680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647497328 (or 1647497324 counting only the distinct ones).

The product of its (nonzero) digits is 134369280, while the sum is 70.

The spelling of 65899892680 in words is "sixty-five billion, eight hundred ninety-nine million, eight hundred ninety-two thousand, six hundred eighty".