66671080 has 64 divisors (see below), whose sum is σ = 176993280. Its totient is φ = 22118400.

The previous prime is 66671053. The next prime is 66671081. The reversal of 66671080 is 8017666.

It is not an unprimeable number, because it can be changed into a prime (66671081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4840 + ... + 12520.

It is an arithmetic number, because the mean of its divisors is an integer number (2765520).

Almost surely, 2^66671080 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66671080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88496640).

66671080 is an abundant number, since it is smaller than the sum of its proper divisors (110322200).

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

66671080 is a wasteful number, since it uses less digits than its factorization.

66671080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7730 (or 7726 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 66671080 is about 8165.2360651729. The cubic root of 66671080 is about 405.4890804357.

The spelling of 66671080 in words is "sixty-six million, six hundred seventy-one thousand, eighty".