1660075566 has 48 divisors (see below), whose sum is σ = 3437354880. Its totient is φ = 534231040.

The previous prime is 1660075561. The next prime is 1660075643. The reversal of 1660075566 is 6655700661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660075561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6459310 + ... + 6459566.

It is an arithmetic number, because the mean of its divisors is an integer number (71611560).

Almost surely, 2^1660075566 is an apocalyptic number.

1660075566 is an abundant number, since it is smaller than the sum of its proper divisors (1777279314).

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

1660075566 is an equidigital number, since it uses as much as digits as its factorization.

1660075566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 1660075566 is about 40744.0249116358. The cubic root of 1660075566 is about 1184.0661138932.

The spelling of 1660075566 in words is "one billion, six hundred sixty million, seventy-five thousand, five hundred sixty-six".