66873360 has 40 divisors (see below), whose sum is σ = 207308160. Its totient is φ = 17832832.

The previous prime is 66873341. The next prime is 66873361. The reversal of 66873360 is 6337866.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66873361) 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, 139080 + ... + 139559.

It is an arithmetic number, because the mean of its divisors is an integer number (5182704).

Almost surely, 2^66873360 is an apocalyptic number.

66873360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66873360 is an abundant number, since it is smaller than the sum of its proper divisors (140434800).

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

66873360 is a wasteful number, since it uses less digits than its factorization.

66873360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278655 (or 278649 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 66873360 is about 8177.6133437575. The cubic root of 66873360 is about 405.8987509097.

The spelling of 66873360 in words is "sixty-six million, eight hundred seventy-three thousand, three hundred sixty".