1659000120 has 128 divisors (see below), whose sum is σ = 5206809600. Its totient is φ = 422073344.

The previous prime is 1659000107. The next prime is 1659000151. The reversal of 1659000120 is 210009561.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2050276 + ... + 2051084.

It is an arithmetic number, because the mean of its divisors is an integer number (40678200).

Almost surely, 2^1659000120 is an apocalyptic number.

1659000120 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 1659000120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2603404800).

1659000120 is an abundant number, since it is smaller than the sum of its proper divisors (3547809480).

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

1659000120 is a wasteful number, since it uses less digits than its factorization.

1659000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589 (or 1585 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1659000120 is about 40730.8251819184. The cubic root of 1659000120 is about 1183.8103676544.

Adding to 1659000120 its reverse (210009561), we get a palindrome (1869009681).

The spelling of 1659000120 in words is "one billion, six hundred fifty-nine million, one hundred twenty", and thus it is an aban number.