66594396 has 48 divisors (see below), whose sum is σ = 171859968. Its totient is φ = 19900800.

The previous prime is 66594391. The next prime is 66594419. The reversal of 66594396 is 69349566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66594391) 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, 6181 + ... + 13091.

It is an arithmetic number, because the mean of its divisors is an integer number (3580416).

Almost surely, 2^66594396 is an apocalyptic number.

66594396 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66594396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85929984).

66594396 is an abundant number, since it is smaller than the sum of its proper divisors (105265572).

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

66594396 is a wasteful number, since it uses less digits than its factorization.

66594396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7002 (or 7000 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 48.

The square root of 66594396 is about 8160.5389527898. The cubic root of 66594396 is about 405.3335584626. Note that the first 3 decimals are identical.

The spelling of 66594396 in words is "sixty-six million, five hundred ninety-four thousand, three hundred ninety-six".