82665688565428 has 12 divisors (see below), whose sum is σ = 144666703595680. Its totient is φ = 41332344680952.

The previous prime is 82665688565413. The next prime is 82665688565431. The reversal of 82665688565428 is 82456588656628.

It is a congruent number.

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, 124528026 + ... + 125190097.

Almost surely, 2^{82665688565428} is an apocalyptic number.

It is an amenable number.

82665688565428 is a deficient number, since it is larger than the sum of its proper divisors (62001015030252).

82665688565428 is a wasteful number, since it uses less digits than its factorization.

82665688565428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249800886 (or 249800884 counting only the distinct ones).

The product of its digits is 10616832000, while the sum is 79.

The spelling of 82665688565428 in words is "eighty-two trillion, six hundred sixty-five billion, six hundred eighty-eight million, five hundred sixty-five thousand, four hundred twenty-eight".