66615336 has 48 divisors (see below), whose sum is σ = 180996660. Its totient is φ = 22133760.

The previous prime is 66615319. The next prime is 66615359. The reversal of 66615336 is 63351666.

It is a happy number.

66615336 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 65512836 + 1102500 = 8094^2 + 1050^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 66615336.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24106 + ... + 26726.

Almost surely, 2^66615336 is an apocalyptic number.

It is an amenable number.

66615336 is an abundant number, since it is smaller than the sum of its proper divisors (114381324).

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

66615336 is a wasteful number, since it uses less digits than its factorization.

66615336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986 (or 2979 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 66615336 is about 8161.8218554438. The cubic root of 66615336 is about 405.3760384897.

The spelling of 66615336 in words is "sixty-six million, six hundred fifteen thousand, three hundred thirty-six".