162166644 has 96 divisors (see below), whose sum is σ = 439447680. Its totient is φ = 51667200.

The previous prime is 162166643. The next prime is 162166649. The reversal of 162166644 is 446661261.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 162166599 and 162166608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162166643) 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, 234339 + ... + 235029.

It is an arithmetic number, because the mean of its divisors is an integer number (4577580).

Almost surely, 2^162166644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 162166644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (219723840).

162166644 is an abundant number, since it is smaller than the sum of its proper divisors (277281036).

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

162166644 is a wasteful number, since it uses less digits than its factorization.

162166644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798 (or 790 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 162166644 is about 12734.4667732889. The cubic root of 162166644 is about 545.3230349314.

It can be divided in two parts, 1621 and 66644, that added together give a triangular number (68265 = T₃₆₉).

The spelling of 162166644 in words is "one hundred sixty-two million, one hundred sixty-six thousand, six hundred forty-four".