66087396 has 72 divisors (see below), whose sum is σ = 179262720. Its totient is φ = 20464704.

The previous prime is 66087391. The next prime is 66087397. The reversal of 66087396 is 69378066.

66087396 is a `hidden beast` number, since 6 + 608 + 7 + 39 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (66087391) 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, 35341 + ... + 37163.

It is an arithmetic number, because the mean of its divisors is an integer number (2489760).

Almost surely, 2^66087396 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 66087396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89631360).

66087396 is an abundant number, since it is smaller than the sum of its proper divisors (113175324).

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

66087396 is a wasteful number, since it uses less digits than its factorization.

66087396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905 (or 1900 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 66087396 is about 8129.4154771423. The cubic root of 66087396 is about 404.3023012704.

It can be divided in two parts, 660873 and 96, that added together give a square (660969 = 813²).

The spelling of 66087396 in words is "sixty-six million, eighty-seven thousand, three hundred ninety-six".