1666562828 has 48 divisors (see below), whose sum is σ = 3383116800. Its totient is φ = 703572480.

The previous prime is 1666562813. The next prime is 1666562867. The reversal of 1666562828 is 8282656661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1793468 + ... + 1794396.

It is an arithmetic number, because the mean of its divisors is an integer number (70481600).

Almost surely, 2^1666562828 is an apocalyptic number.

It is an amenable number.

1666562828 is an abundant number, since it is smaller than the sum of its proper divisors (1716553972).

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

1666562828 is a wasteful number, since it uses less digits than its factorization.

1666562828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830 (or 1828 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The square root of 1666562828 is about 40823.5572678325. The cubic root of 1666562828 is about 1185.6064781148.

The spelling of 1666562828 in words is "one billion, six hundred sixty-six million, five hundred sixty-two thousand, eight hundred twenty-eight".