165825666828 has 24 divisors (see below), whose sum is σ = 429918395760. Its totient is φ = 55275222240.

The previous prime is 165825666793. The next prime is 165825666833. The reversal of 165825666828 is 828666528561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 767711313 + ... + 767711528.

It is an arithmetic number, because the mean of its divisors is an integer number (17913266490).

Almost surely, 2^165825666828 is an apocalyptic number.

165825666828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

165825666828 is an abundant number, since it is smaller than the sum of its proper divisors (264092728932).

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

165825666828 is a wasteful number, since it uses less digits than its factorization.

165825666828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1535422854 (or 1535422846 counting only the distinct ones).

The product of its digits is 66355200, while the sum is 63.

The spelling of 165825666828 in words is "one hundred sixty-five billion, eight hundred twenty-five million, six hundred sixty-six thousand, eight hundred twenty-eight".