1661343224 has 32 divisors (see below), whose sum is σ = 3300523200. Its totient is φ = 781271040.

The previous prime is 1661343217. The next prime is 1661343251. The reversal of 1661343224 is 4223431661.

It is a super-3 number, since 3×1661343224³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 251192 + ... + 257720.

It is an arithmetic number, because the mean of its divisors is an integer number (103141350).

Almost surely, 2^1661343224 is an apocalyptic number.

It is an amenable number.

1661343224 is a deficient number, since it is larger than the sum of its proper divisors (1639179976).

1661343224 is a wasteful number, since it uses less digits than its factorization.

1661343224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8423 (or 8419 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 1661343224 is about 40759.5783098893. The cubic root of 1661343224 is about 1184.3674272822.

Adding to 1661343224 its reverse (4223431661), we get a palindrome (5884774885).

The spelling of 1661343224 in words is "one billion, six hundred sixty-one million, three hundred forty-three thousand, two hundred twenty-four".