166768390 has 16 divisors (see below), whose sum is σ = 300464640. Its totient is φ = 66644800.

The previous prime is 166768387. The next prime is 166768391. The reversal of 166768390 is 93867661.

166768390 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 166768390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166768391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4266 + ... + 18754.

It is an arithmetic number, because the mean of its divisors is an integer number (18779040).

Almost surely, 2^166768390 is an apocalyptic number.

166768390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166768390 is a deficient number, since it is larger than the sum of its proper divisors (133696250).

166768390 is a wasteful number, since it uses less digits than its factorization.

166768390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15647.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 166768390 is about 12913.8836141573. The cubic root of 166768390 is about 550.4331463941.

The spelling of 166768390 in words is "one hundred sixty-six million, seven hundred sixty-eight thousand, three hundred ninety".