166681848520 has 64 divisors (see below), whose sum is σ = 415835259840. Its totient is φ = 59617939200.

The previous prime is 166681848503. The next prime is 166681848533. The reversal of 166681848520 is 25848186661.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3078262 + ... + 3131941.

It is an arithmetic number, because the mean of its divisors is an integer number (6497425935).

Almost surely, 2^166681848520 is an apocalyptic number.

166681848520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166681848520 is an abundant number, since it is smaller than the sum of its proper divisors (249153411320).

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

166681848520 is a wasteful number, since it uses less digits than its factorization.

166681848520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6210286 (or 6210282 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 55.

The spelling of 166681848520 in words is "one hundred sixty-six billion, six hundred eighty-one million, eight hundred forty-eight thousand, five hundred twenty".