1665055131 has 8 divisors (see below), whose sum is σ = 2220409920. Its totient is φ = 1109868552.

The previous prime is 1665055129. The next prime is 1665055153. The reversal of 1665055131 is 1315505661.

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

It is not a de Polignac number, because 1665055131 - 2¹ = 1665055129 is a prime.

It is a super-2 number, since 2×1665055131² = 5544817178538854322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1665055092 and 1665055101.

It is not an unprimeable number, because it can be changed into a prime (1665055111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16785 + ... + 60098.

It is an arithmetic number, because the mean of its divisors is an integer number (277551240).

Almost surely, 2^1665055131 is an apocalyptic number.

1665055131 is a deficient number, since it is larger than the sum of its proper divisors (555354789).

1665055131 is an equidigital number, since it uses as much as digits as its factorization.

1665055131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84105.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 1665055131 is about 40805.0870725698. The cubic root of 1665055131 is about 1185.2488409034.

The spelling of 1665055131 in words is "one billion, six hundred sixty-five million, fifty-five thousand, one hundred thirty-one".