1660968288 has 144 divisors (see below), whose sum is σ = 5635571760. Its totient is φ = 474550272.

The previous prime is 1660968259. The next prime is 1660968311. The reversal of 1660968288 is 8828690661.

It is a happy number.

1660968288 is a `hidden beast` number, since 1 + 6 + 609 + 6 + 8 + 28 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22720 + ... + 61952.

It is an arithmetic number, because the mean of its divisors is an integer number (39135915).

Almost surely, 2^1660968288 is an apocalyptic number.

1660968288 is a gapful number since it is divisible by the number (18) 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 1660968288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2817785880).

1660968288 is an abundant number, since it is smaller than the sum of its proper divisors (3974603472).

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

1660968288 is a wasteful number, since it uses less digits than its factorization.

1660968288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39266 (or 39245 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 1660968288 is about 40754.9786897257. The cubic root of 1660968288 is about 1184.2783236001.

The spelling of 1660968288 in words is "one billion, six hundred sixty million, nine hundred sixty-eight thousand, two hundred eighty-eight".