66891160 has 32 divisors (see below), whose sum is σ = 172006560. Its totient is φ = 22934016.

The previous prime is 66891151. The next prime is 66891161. The reversal of 66891160 is 6119866.

It is a super-3 number, since 3×66891160³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66891161) 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, 119169 + ... + 119728.

It is an arithmetic number, because the mean of its divisors is an integer number (5375205).

Almost surely, 2^66891160 is an apocalyptic number.

It is an amenable number.

66891160 is an abundant number, since it is smaller than the sum of its proper divisors (105115400).

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

66891160 is a wasteful number, since it uses less digits than its factorization.

66891160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238915 (or 238911 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 66891160 is about 8178.7016084462. The cubic root of 66891160 is about 405.9347610480.

The spelling of 66891160 in words is "sixty-six million, eight hundred ninety-one thousand, one hundred sixty".