1660677228 has 180 divisors, whose sum is σ = 5225718960. Its totient is φ = 457990848.

The previous prime is 1660677191. The next prime is 1660677259. The reversal of 1660677228 is 8227760661.

1660677228 is a `hidden beast` number, since 16 + 606 + 7 + 7 + 2 + 28 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 458601 + ... + 462207.

It is an arithmetic number, because the mean of its divisors is an integer number (29031772).

Almost surely, 2^1660677228 is an apocalyptic number.

1660677228 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 1660677228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2612859480).

1660677228 is an abundant number, since it is smaller than the sum of its proper divisors (3565041732).

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

1660677228 is a wasteful number, since it uses less digits than its factorization.

1660677228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666 (or 3648 counting only the distinct ones).

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

The square root of 1660677228 is about 40751.4076812078. The cubic root of 1660677228 is about 1184.2091438356.

The spelling of 1660677228 in words is "one billion, six hundred sixty million, six hundred seventy-seven thousand, two hundred twenty-eight".