66061736 has 24 divisors (see below), whose sum is σ = 133561470. Its totient is φ = 30451776.

The previous prime is 66061733. The next prime is 66061741. The reversal of 66061736 is 63716066.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 44809636 + 21252100 = 6694^2 + 4610^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66061696 and 66061705.

It is not an unprimeable number, because it can be changed into a prime (66061733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82490 + ... + 83286.

Almost surely, 2^66061736 is an apocalyptic number.

It is an amenable number.

66061736 is an abundant number, since it is smaller than the sum of its proper divisors (67499734).

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

66061736 is an equidigital number, since it uses as much as digits as its factorization.

66061736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66061736 is about 8127.8371046669. The cubic root of 66061736 is about 404.2499678419.

The spelling of 66061736 in words is "sixty-six million, sixty-one thousand, seven hundred thirty-six".