65966686082478 has 48 divisors (see below), whose sum is σ = 142981190352000. Its totient is φ = 21980685378960.

The previous prime is 65966686082461. The next prime is 65966686082501. The reversal of 65966686082478 is 87428068666956.

It is a junction number, because it is equal to n+sod(n) for n = 65966686082397 and 65966686082406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1620822573 + ... + 1620863271.

It is an arithmetic number, because the mean of its divisors is an integer number (2978774799000).

Almost surely, 2^{65966686082478} is an apocalyptic number.

65966686082478 is an abundant number, since it is smaller than the sum of its proper divisors (77014504269522).

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

65966686082478 is a wasteful number, since it uses less digits than its factorization.

65966686082478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72117 (or 72114 counting only the distinct ones).

The product of its (nonzero) digits is 10032906240, while the sum is 81.

The spelling of 65966686082478 in words is "sixty-five trillion, nine hundred sixty-six billion, six hundred eighty-six million, eighty-two thousand, four hundred seventy-eight".