166788650 has 72 divisors (see below), whose sum is σ = 379975680. Its totient is φ = 54159840.

The previous prime is 166788647. The next prime is 166788659. The reversal of 166788650 is 56887661.

166788650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 166788595 and 166788604.

It is not an unprimeable number, because it can be changed into a prime (166788659) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44759 + ... + 48341.

It is an arithmetic number, because the mean of its divisors is an integer number (5277440).

Almost surely, 2^166788650 is an apocalyptic number.

166788650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166788650 is an abundant number, since it is smaller than the sum of its proper divisors (213187030).

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

166788650 is a wasteful number, since it uses less digits than its factorization.

166788650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3628 (or 3616 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 166788650 is about 12914.6680174134. The cubic root of 166788650 is about 550.4554354382.

The spelling of 166788650 in words is "one hundred sixty-six million, seven hundred eighty-eight thousand, six hundred fifty".