1666443088 has 20 divisors (see below), whose sum is σ = 3418659540. Its totient is φ = 784208384.

The previous prime is 1666443083. The next prime is 1666443091. The reversal of 1666443088 is 8803446661.

It can be written as a sum of positive squares in 2 ways, for example, as 1107025984 + 559417104 = 33272^2 + 23652^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666443083) 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, 3063043 + ... + 3063586.

It is an arithmetic number, because the mean of its divisors is an integer number (170932977).

Almost surely, 2^1666443088 is an apocalyptic number.

It is an amenable number.

1666443088 is an abundant number, since it is smaller than the sum of its proper divisors (1752216452).

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

1666443088 is a wasteful number, since it uses less digits than its factorization.

1666443088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6126654 (or 6126648 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The square root of 1666443088 is about 40822.0906862939. The cubic root of 1666443088 is about 1185.5780827617.

The spelling of 1666443088 in words is "one billion, six hundred sixty-six million, four hundred forty-three thousand, eighty-eight".