68166210 has 128 divisors (see below), whose sum is σ = 198918144. Its totient is φ = 14618880.

The previous prime is 68166199. The next prime is 68166221. The reversal of 68166210 is 1266186.

It is an interprime number because it is at equal distance from previous prime (68166199) and next prime (68166221).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 240729 + ... + 241011.

It is an arithmetic number, because the mean of its divisors is an integer number (1554048).

Almost surely, 2^68166210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68166210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99459072).

68166210 is an abundant number, since it is smaller than the sum of its proper divisors (130751934).

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

68166210 is a wasteful number, since it uses less digits than its factorization.

68166210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 68166210 is about 8256.2830620080. The cubic root of 68166210 is about 408.4977944586.

The spelling of 68166210 in words is "sixty-eight million, one hundred sixty-six thousand, two hundred ten".