65066631433640 has 16 divisors (see below), whose sum is σ = 146399920725780. Its totient is φ = 26026652573440.

The previous prime is 65066631433621. The next prime is 65066631433663. The reversal of 65066631433640 is 4633413666056.

It can be written as a sum of positive squares in 2 ways, for example, as 64624781414116 + 441850019524 = 8038954^2 + 664718^2 .

It is a super-2 number, since 2×65066631433640² (a number of 28 digits) contains 22 as substring.

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, 813332892881 + ... + 813332892960.

Almost surely, 2^{65066631433640} is an apocalyptic number.

It is an amenable number.

65066631433640 is an abundant number, since it is smaller than the sum of its proper divisors (81333289292140).

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

65066631433640 is a wasteful number, since it uses less digits than its factorization.

65066631433640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626665785852 (or 1626665785848 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 53.

The spelling of 65066631433640 in words is "sixty-five trillion, sixty-six billion, six hundred thirty-one million, four hundred thirty-three thousand, six hundred forty".