605790666 has 48 divisors (see below), whose sum is σ = 1416509640. Its totient is φ = 186001920.

The previous prime is 605790659. The next prime is 605790667. The reversal of 605790666 is 666097506.

It can be written as a sum of positive squares in 4 ways, for example, as 259049025 + 346741641 = 16095^2 + 18621^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (605790667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119430 + ... + 124398.

Almost surely, 2^605790666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 605790666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708254820).

605790666 is an abundant number, since it is smaller than the sum of its proper divisors (810718974).

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

605790666 is a wasteful number, since it uses less digits than its factorization.

605790666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5511 (or 5508 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 605790666 is about 24612.8150767034. The cubic root of 605790666 is about 846.1373366565.

The spelling of 605790666 in words is "six hundred five million, seven hundred ninety thousand, six hundred sixty-six".