166722000 has 160 divisors (see below), whose sum is σ = 552774144. Its totient is φ = 43200000.

The previous prime is 166721993. The next prime is 166722007. The reversal of 166722000 is 227661.

It is a happy number.

166722000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166721993) and next prime (166722007).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166722007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221625 + ... + 222375.

Almost surely, 2^166722000 is an apocalyptic number.

166722000 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 166722000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276387072).

166722000 is an abundant number, since it is smaller than the sum of its proper divisors (386052144).

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

166722000 is a wasteful number, since it uses less digits than its factorization.

166722000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 166722000 is about 12912.0873602993. The cubic root of 166722000 is about 550.3821036242.

Adding to 166722000 its reverse (227661), we get a palindrome (166949661).

The spelling of 166722000 in words is "one hundred sixty-six million, seven hundred twenty-two thousand".