1661164332 has 24 divisors (see below), whose sum is σ = 3878784000. Its totient is φ = 553330896.

The previous prime is 1661164313. The next prime is 1661164343. The reversal of 1661164332 is 2334611661.

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 = 1661164293 and 1661164302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30832 + ... + 65367.

It is an arithmetic number, because the mean of its divisors is an integer number (161616000).

Almost surely, 2^1661164332 is an apocalyptic number.

1661164332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1661164332 is an abundant number, since it is smaller than the sum of its proper divisors (2217619668).

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

1661164332 is a wasteful number, since it uses less digits than its factorization.

1661164332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97645 (or 97643 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 1661164332 is about 40757.3837727595. The cubic root of 1661164332 is about 1184.3249152032.

Adding to 1661164332 its reverse (2334611661), we get a palindrome (3995775993).

The spelling of 1661164332 in words is "one billion, six hundred sixty-one million, one hundred sixty-four thousand, three hundred thirty-two".