1660120000 has 420 divisors, whose sum is σ = 5276748400. Its totient is φ = 517440000.

The previous prime is 1660119977. The next prime is 1660120019. The reversal of 1660120000 is 210661.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 150919995 + ... + 150920005.

Almost surely, 2^1660120000 is an apocalyptic number.

1660120000 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 1660120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2638374200).

1660120000 is an abundant number, since it is smaller than the sum of its proper divisors (3616628400).

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

1660120000 is an frugal number, since it uses more digits than its factorization.

1660120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 25 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1660120000 is about 40744.5701903947. The cubic root of 1660120000 is about 1184.0766781361.

Adding to 1660120000 its reverse (210661), we get a palindrome (1660330661).

The spelling of 1660120000 in words is "one billion, six hundred sixty million, one hundred twenty thousand".