168866320 has 80 divisors (see below), whose sum is σ = 451899648. Its totient is φ = 57484800.

The previous prime is 168866309. The next prime is 168866339. The reversal of 168866320 is 23668861.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83562 + ... + 85558.

Almost surely, 2^168866320 is an apocalyptic number.

168866320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168866320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225949824).

168866320 is an abundant number, since it is smaller than the sum of its proper divisors (283033328).

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

168866320 is a wasteful number, since it uses less digits than its factorization.

168866320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168 (or 2162 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 168866320 is about 12994.8574443893. The cubic root of 168866320 is about 552.7316664612.

The spelling of 168866320 in words is "one hundred sixty-eight million, eight hundred sixty-six thousand, three hundred twenty".