66894594 has 48 divisors (see below), whose sum is σ = 148871232. Its totient is φ = 20015424.

The previous prime is 66894587. The next prime is 66894599. The reversal of 66894594 is 49549866.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66894599) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36627 + ... + 38409.

It is an arithmetic number, because the mean of its divisors is an integer number (3101484).

Almost surely, 2^66894594 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66894594, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74435616).

66894594 is an abundant number, since it is smaller than the sum of its proper divisors (81976638).

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

66894594 is a wasteful number, since it uses less digits than its factorization.

66894594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851 (or 1838 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 51.

The square root of 66894594 is about 8178.9115412749. The cubic root of 66894594 is about 405.9417074373.

The spelling of 66894594 in words is "sixty-six million, eight hundred ninety-four thousand, five hundred ninety-four".