1666062120 has 128 divisors (see below), whose sum is σ = 5294707200. Its totient is φ = 418224384.

The previous prime is 1666062113. The next prime is 1666062121. The reversal of 1666062120 is 212606661.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1666062121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369399 + ... + 373881.

It is an arithmetic number, because the mean of its divisors is an integer number (41364900).

Almost surely, 2^1666062120 is an apocalyptic number.

1666062120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1666062120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2647353600).

1666062120 is an abundant number, since it is smaller than the sum of its proper divisors (3628645080).

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

1666062120 is a wasteful number, since it uses less digits than its factorization.

1666062120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4679 (or 4675 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 1666062120 is about 40817.4242205458. The cubic root of 1666062120 is about 1185.4877302943.

Adding to 1666062120 its reverse (212606661), we get a palindrome (1878668781).

The spelling of 1666062120 in words is "one billion, six hundred sixty-six million, sixty-two thousand, one hundred twenty".