1666843350 has 96 divisors (see below), whose sum is σ = 4366220544. Its totient is φ = 419971200.

The previous prime is 1666843349. The next prime is 1666843351. The reversal of 1666843350 is 533486661.

It is an interprime number because it is at equal distance from previous prime (1666843349) and next prime (1666843351).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666843351) 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, 283440 + ... + 289260.

It is an arithmetic number, because the mean of its divisors is an integer number (45481464).

Almost surely, 2^1666843350 is an apocalyptic number.

1666843350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666843350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2183110272).

1666843350 is an abundant number, since it is smaller than the sum of its proper divisors (2699377194).

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

1666843350 is a wasteful number, since it uses less digits than its factorization.

1666843350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5942 (or 5937 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 1666843350 is about 40826.9929091037. The cubic root of 1666843350 is about 1185.6729962673.

The spelling of 1666843350 in words is "one billion, six hundred sixty-six million, eight hundred forty-three thousand, three hundred fifty".