66641360 has 80 divisors (see below), whose sum is σ = 172756800. Its totient is φ = 23758848.

The previous prime is 66641317. The next prime is 66641363. The reversal of 66641360 is 6314666.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66641363) 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, 24551 + ... + 27129.

It is an arithmetic number, because the mean of its divisors is an integer number (2159460).

Almost surely, 2^66641360 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 66641360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86378400).

66641360 is an abundant number, since it is smaller than the sum of its proper divisors (106115440).

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

66641360 is a wasteful number, since it uses less digits than its factorization.

66641360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628 (or 2622 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 66641360 is about 8163.4159516712. The cubic root of 66641360 is about 405.4288197920.

The spelling of 66641360 in words is "sixty-six million, six hundred forty-one thousand, three hundred sixty".