825516786666 has 48 divisors (see below), whose sum is σ = 1950333392160. Its totient is φ = 230913783360.

The previous prime is 825516786649. The next prime is 825516786671. The reversal of 825516786666 is 666687615528.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a junction number, because it is equal to n+sod(n) for n = 825516786597 and 825516786606.

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, 36994261 + ... + 37016568.

It is an arithmetic number, because the mean of its divisors is an integer number (40631945670).

Almost surely, 2^825516786666 is an apocalyptic number.

825516786666 is an abundant number, since it is smaller than the sum of its proper divisors (1124816605494).

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

825516786666 is a wasteful number, since it uses less digits than its factorization.

825516786666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74010871 (or 74010858 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 66.

The spelling of 825516786666 in words is "eight hundred twenty-five billion, five hundred sixteen million, seven hundred eighty-six thousand, six hundred sixty-six".