1661383735 has 16 divisors (see below), whose sum is σ = 2302839072. Its totient is φ = 1137203200.

The previous prime is 1661383729. The next prime is 1661383747. The reversal of 1661383735 is 5373831661.

It is a happy number.

It is not a de Polignac number, because 1661383735 - 2³ = 1661383727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1661383691 and 1661383700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 887506 + ... + 889375.

It is an arithmetic number, because the mean of its divisors is an integer number (143927442).

Almost surely, 2^1661383735 is an apocalyptic number.

1661383735 is a deficient number, since it is larger than the sum of its proper divisors (641455337).

1661383735 is a wasteful number, since it uses less digits than its factorization.

1661383735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776914.

The product of its digits is 272160, while the sum is 43.

The square root of 1661383735 is about 40760.0752575360. The cubic root of 1661383735 is about 1184.3770539341.

The spelling of 1661383735 in words is "one billion, six hundred sixty-one million, three hundred eighty-three thousand, seven hundred thirty-five".