66515256246 has 32 divisors (see below), whose sum is σ = 135893011968. Its totient is φ = 21694891680.

The previous prime is 66515256229. The next prime is 66515256253. The reversal of 66515256246 is 64265251566.

It is a junction number, because it is equal to n+sod(n) for n = 66515256195 and 66515256204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1277601 + ... + 1328643.

It is an arithmetic number, because the mean of its divisors is an integer number (4246656624).

Almost surely, 2^66515256246 is an apocalyptic number.

66515256246 is an abundant number, since it is smaller than the sum of its proper divisors (69377755722).

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

66515256246 is a wasteful number, since it uses less digits than its factorization.

66515256246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55716.

The product of its digits is 2592000, while the sum is 48.

The spelling of 66515256246 in words is "sixty-six billion, five hundred fifteen million, two hundred fifty-six thousand, two hundred forty-six".