6665780160 has 168 divisors, whose sum is σ = 24691299360. Its totient is φ = 1640798208.

The previous prime is 6665780129. The next prime is 6665780171. The reversal of 6665780160 is 610875666.

It is a super-3 number, since 3×6665780160³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51580 + ... + 126459.

It is an arithmetic number, because the mean of its divisors is an integer number (146972020).

Almost surely, 2^6665780160 is an apocalyptic number.

6665780160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6665780160 is an abundant number, since it is smaller than the sum of its proper divisors (18025519200).

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

6665780160 is a wasteful number, since it uses less digits than its factorization.

6665780160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178075 (or 178062 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 6665780160 is about 81644.2291898209. The cubic root of 6665780160 is about 1881.9886305927.

The spelling of 6665780160 in words is "six billion, six hundred sixty-five million, seven hundred eighty thousand, one hundred sixty".