66060600426640 has 40 divisors (see below), whose sum is σ = 153592952924088. Its totient is φ = 26423886289920.

The previous prime is 66060600426599. The next prime is 66060600426683. The reversal of 66060600426640 is 4662400606066.

It can be written as a sum of positive squares in 4 ways, for example, as 1630504255744 + 64430096170896 = 1276912^2 + 8026836^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522684 + ... + 11506276.

Almost surely, 2^{66060600426640} is an apocalyptic number.

It is an amenable number.

66060600426640 is an abundant number, since it is smaller than the sum of its proper divisors (87532352497448).

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

66060600426640 is a wasteful number, since it uses less digits than its factorization.

66060600426640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11058787 (or 11058781 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 46.

The spelling of 66060600426640 in words is "sixty-six trillion, sixty billion, six hundred million, four hundred twenty-six thousand, six hundred forty".