66703278132 has 36 divisors (see below), whose sum is σ = 168768889380. Its totient is φ = 22213613952.

The previous prime is 66703278127. The next prime is 66703278133. The reversal of 66703278132 is 23187230766.

It can be written as a sum of positive squares in 2 ways, for example, as 45294906276 + 21408371856 = 212826^2 + 146316^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66703278133) 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 11 ways as a sum of consecutive naturals, for example, 828153 + ... + 905120.

It is an arithmetic number, because the mean of its divisors is an integer number (4688024705).

Almost surely, 2^66703278132 is an apocalyptic number.

It is an amenable number.

66703278132 is an abundant number, since it is smaller than the sum of its proper divisors (102065611248).

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

66703278132 is a wasteful number, since it uses less digits than its factorization.

66703278132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734352 (or 1734347 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 66703278132 in words is "sixty-six billion, seven hundred three million, two hundred seventy-eight thousand, one hundred thirty-two".