1660272768 has 512 divisors, whose sum is σ = 6486220800. Its totient is φ = 404766720.

The previous prime is 1660272767. The next prime is 1660272781. The reversal of 1660272768 is 8672720661.

1660272768 is a `hidden beast` number, since 16 + 602 + 7 + 27 + 6 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1660272767) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4523721 + ... + 4524087.

It is an arithmetic number, because the mean of its divisors is an integer number (12668400).

Almost surely, 2^1660272768 is an apocalyptic number.

1660272768 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 1660272768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3243110400).

1660272768 is an abundant number, since it is smaller than the sum of its proper divisors (4825948032).

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

1660272768 is a wasteful number, since it uses less digits than its factorization.

1660272768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 1660272768 is about 40746.4448510542. Note that the first 3 decimals coincide. The cubic root of 1660272768 is about 1184.1129974941.

The spelling of 1660272768 in words is "one billion, six hundred sixty million, two hundred seventy-two thousand, seven hundred sixty-eight".