1660716288 has 648 divisors, whose sum is σ = 6446154624. Its totient is φ = 401448960.

The previous prime is 1660716259. The next prime is 1660716331. The reversal of 1660716288 is 8826170661.

It is a happy number.

1660716288 is a `hidden beast` number, since 1 + 6 + 607 + 16 + 28 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 44884206 + ... + 44884242.

Almost surely, 2^1660716288 is an apocalyptic number.

1660716288 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 1660716288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3223077312).

1660716288 is an abundant number, since it is smaller than the sum of its proper divisors (4785438336).

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

1660716288 is a wasteful number, since it uses less digits than its factorization.

1660716288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1660716288 is about 40751.8869256382. The cubic root of 1660716288 is about 1184.2184281697.

The spelling of 1660716288 in words is "one billion, six hundred sixty million, seven hundred sixteen thousand, two hundred eighty-eight".