1665285490 has 96 divisors (see below), whose sum is σ = 3539576880. Its totient is φ = 561623040.

The previous prime is 1665285487. The next prime is 1665285499. The reversal of 1665285490 is 945825661.

It can be written as a sum of positive squares in 8 ways, for example, as 480617929 + 1184667561 = 21923^2 + 34419^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1665285490.

It is not an unprimeable number, because it can be changed into a prime (1665285499) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1501056 + ... + 1502164.

Almost surely, 2^1665285490 is an apocalyptic number.

1665285490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665285490 is an abundant number, since it is smaller than the sum of its proper divisors (1874291390).

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

1665285490 is a wasteful number, since it uses less digits than its factorization.

1665285490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228 (or 1217 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The square root of 1665285490 is about 40807.9096499686. The cubic root of 1665285490 is about 1185.3034977818.

The spelling of 1665285490 in words is "one billion, six hundred sixty-five million, two hundred eighty-five thousand, four hundred ninety".