1661833131 has 8 divisors (see below), whose sum is σ = 2532317184. Its totient is φ = 949618920.

The previous prime is 1661833111. The next prime is 1661833211. The reversal of 1661833131 is 1313381661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1661833131 - 2¹³ = 1661824939 is a prime.

It is a super-2 number, since 2×1661833131² = 5523378710578526322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1661833092 and 1661833101.

It is not an unprimeable number, because it can be changed into a prime (1661833111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39567435 + ... + 39567476.

It is an arithmetic number, because the mean of its divisors is an integer number (316539648).

Almost surely, 2^1661833131 is an apocalyptic number.

1661833131 is a deficient number, since it is larger than the sum of its proper divisors (870484053).

1661833131 is an equidigital number, since it uses as much as digits as its factorization.

1661833131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79134921.

The product of its digits is 7776, while the sum is 33.

The square root of 1661833131 is about 40765.5875831565. The cubic root of 1661833131 is about 1184.4838336656.

The spelling of 1661833131 in words is "one billion, six hundred sixty-one million, eight hundred thirty-three thousand, one hundred thirty-one".