1661412336 has 20 divisors (see below), whose sum is σ = 4291981992. Its totient is φ = 553804096.

The previous prime is 1661412331. The next prime is 1661412367. The reversal of 1661412336 is 6332141661.

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 = 1661412297 and 1661412306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1661412331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17306331 + ... + 17306426.

Almost surely, 2^1661412336 is an apocalyptic number.

1661412336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1661412336 is an abundant number, since it is smaller than the sum of its proper divisors (2630569656).

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

1661412336 is a wasteful number, since it uses less digits than its factorization.

1661412336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34612768 (or 34612762 counting only the distinct ones).

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

The square root of 1661412336 is about 40760.4261017963. The cubic root of 1661412336 is about 1184.3838503118.

Adding to 1661412336 its reverse (6332141661), we get a palindrome (7993553997).

The spelling of 1661412336 in words is "one billion, six hundred sixty-one million, four hundred twelve thousand, three hundred thirty-six".