1665885106 has 8 divisors (see below), whose sum is σ = 2584994220. Its totient is φ = 804220368.

The previous prime is 1665885103. The next prime is 1665885121. The reversal of 1665885106 is 6015885661.

It can be written as a sum of positive squares in 2 ways, for example, as 1657711225 + 8173881 = 40715^2 + 2859^2 .

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

It is a super-3 number, since 3×1665885106³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1665885103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14361021 + ... + 14361136.

Almost surely, 2^1665885106 is an apocalyptic number.

1665885106 is a deficient number, since it is larger than the sum of its proper divisors (919109114).

1665885106 is a wasteful number, since it uses less digits than its factorization.

1665885106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28722188.

The product of its (nonzero) digits is 345600, while the sum is 46.

The square root of 1665885106 is about 40815.2557997619. The cubic root of 1665885106 is about 1185.4457439932.

The spelling of 1665885106 in words is "one billion, six hundred sixty-five million, eight hundred eighty-five thousand, one hundred six".