1666068306 has 80 divisors (see below), whose sum is σ = 4116528864. Its totient is φ = 447952512.

The previous prime is 1666068281. The next prime is 1666068307. The reversal of 1666068306 is 6038606661.

1666068306 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

1666068306 is a modest number, since divided by 68306 gives 16660 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666068307) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 241501 + ... + 248303.

Almost surely, 2^1666068306 is an apocalyptic number.

It is a pronic number, being equal to 40817×40818.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666068306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2058264432).

1666068306 is an abundant number, since it is smaller than the sum of its proper divisors (2450460558).

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

1666068306 is an equidigital number, since it uses as much as digits as its factorization.

1666068306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6853 (or 6832 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 1666068306 is about 40817.4999969376. The cubic root of 1666068306 is about 1185.4891975101.

The spelling of 1666068306 in words is "one billion, six hundred sixty-six million, sixty-eight thousand, three hundred six".