66636396 has 36 divisors (see below), whose sum is σ = 178351992. Its totient is φ = 20905344.

The previous prime is 66636343. The next prime is 66636397. The reversal of 66636396 is 69363666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (66636397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53830 + ... + 55053.

It is an arithmetic number, because the mean of its divisors is an integer number (4954222).

Almost surely, 2^66636396 is an apocalyptic number.

It is an amenable number.

66636396 is an abundant number, since it is smaller than the sum of its proper divisors (111715596).

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

66636396 is a wasteful number, since it uses less digits than its factorization.

66636396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108910 (or 108905 counting only the distinct ones).

The product of its digits is 629856, while the sum is 45.

The square root of 66636396 is about 8163.1119066199. Note that the first 3 decimals coincide. The cubic root of 66636396 is about 405.4187529775.

The spelling of 66636396 in words is "sixty-six million, six hundred thirty-six thousand, three hundred ninety-six".