66061602260 has 12 divisors (see below), whose sum is σ = 138729364788. Its totient is φ = 26424640896.

The previous prime is 66061602259. The next prime is 66061602263. The reversal of 66061602260 is 6220616066.

It can be written as a sum of positive squares in 2 ways, for example, as 37043161156 + 29018441104 = 192466^2 + 170348^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 66061602260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66061602263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1651540037 + ... + 1651540076.

It is an arithmetic number, because the mean of its divisors is an integer number (11560780399).

Almost surely, 2^66061602260 is an apocalyptic number.

It is an amenable number.

66061602260 is an abundant number, since it is smaller than the sum of its proper divisors (72667762528).

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

66061602260 is a wasteful number, since it uses less digits than its factorization.

66061602260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303080122 (or 3303080120 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 66061602260 in words is "sixty-six billion, sixty-one million, six hundred two thousand, two hundred sixty".