1665883090 has 8 divisors (see below), whose sum is σ = 2998589580. Its totient is φ = 666353232.

The previous prime is 1665883069. The next prime is 1665883103. The reversal of 1665883090 is 903885661.

It can be written as a sum of positive squares in 2 ways, for example, as 1516089969 + 149793121 = 38937^2 + 12239^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1665883090.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 83294145 + ... + 83294164.

Almost surely, 2^1665883090 is an apocalyptic number.

1665883090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665883090 is a deficient number, since it is larger than the sum of its proper divisors (1332706490).

1665883090 is a wasteful number, since it uses less digits than its factorization.

1665883090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166588316.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 1665883090 is about 40815.2311031066. The cubic root of 1665883090 is about 1185.4452657971.

The spelling of 1665883090 in words is "one billion, six hundred sixty-five million, eight hundred eighty-three thousand, ninety".