1660143816 has 32 divisors (see below), whose sum is σ = 4611511200. Its totient is φ = 553381200.

The previous prime is 1660143799. The next prime is 1660143817. The reversal of 1660143816 is 6183410661.

1660143816 is a `hidden beast` number, since 1 + 6 + 601 + 4 + 38 + 16 = 666.

It is a super-3 number, since 3×1660143816³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1660143817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3842710 + ... + 3843141.

It is an arithmetic number, because the mean of its divisors is an integer number (144109725).

Almost surely, 2^1660143816 is an apocalyptic number.

It is an amenable number.

1660143816 is an abundant number, since it is smaller than the sum of its proper divisors (2951367384).

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

1660143816 is a wasteful number, since it uses less digits than its factorization.

1660143816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7685866 (or 7685856 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1660143816 is about 40744.8624491481. The cubic root of 1660143816 is about 1184.0823403443.

The spelling of 1660143816 in words is "one billion, six hundred sixty million, one hundred forty-three thousand, eight hundred sixteen".