1667171044 has 48 divisors (see below), whose sum is σ = 3673547136. Its totient is φ = 643104000.

The previous prime is 1667170997. The next prime is 1667171047. The reversal of 1667171044 is 4401717661.

It is a junction number, because it is equal to n+sod(n) for n = 1667170994 and 1667171012.

It is not an unprimeable number, because it can be changed into a prime (1667171047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4312 + ... + 57904.

It is an arithmetic number, because the mean of its divisors is an integer number (76532232).

Almost surely, 2^1667171044 is an apocalyptic number.

1667171044 is a gapful number since it is divisible by the number (14) 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 1667171044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1836773568).

1667171044 is an abundant number, since it is smaller than the sum of its proper divisors (2006376092).

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

1667171044 is a wasteful number, since it uses less digits than its factorization.

1667171044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53716 (or 53714 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 1667171044 is about 40831.0059146233. The cubic root of 1667171044 is about 1185.7506905246.

It can be divided in two parts, 166717 and 1044, that added together give a palindrome (167761).

The spelling of 1667171044 in words is "one billion, six hundred sixty-seven million, one hundred seventy-one thousand, forty-four".