1660566516 has 24 divisors (see below), whose sum is σ = 4428177600. Its totient is φ = 474447552.

The previous prime is 1660566497. The next prime is 1660566521. The reversal of 1660566516 is 6156650661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 9884241 + ... + 9884408.

It is an arithmetic number, because the mean of its divisors is an integer number (184507400).

Almost surely, 2^1660566516 is an apocalyptic number.

It is an amenable number.

1660566516 is an abundant number, since it is smaller than the sum of its proper divisors (2767611084).

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

1660566516 is a wasteful number, since it uses less digits than its factorization.

1660566516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19768663 (or 19768661 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 1660566516 is about 40750.0492760438. The cubic root of 1660566516 is about 1184.1828274481.

The spelling of 1660566516 in words is "one billion, six hundred sixty million, five hundred sixty-six thousand, five hundred sixteen".