60665566156561 has 4 divisors (see below), whose sum is σ = 60970418248000. Its totient is φ = 60360714065124.

The previous prime is 60665566156553. The next prime is 60665566156607. The reversal of 60665566156561 is 16565166556606.

60665566156561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 60665566156561 - 2³ = 60665566156553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 60665566156493 and 60665566156502.

It is not an unprimeable number, because it can be changed into a prime (60665566156661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152426045421 + ... + 152426045818.

It is an arithmetic number, because the mean of its divisors is an integer number (15242604562000).

Almost surely, 2^{60665566156561} is an apocalyptic number.

It is an amenable number.

60665566156561 is a deficient number, since it is larger than the sum of its proper divisors (304852091439).

60665566156561 is a wasteful number, since it uses less digits than its factorization.

60665566156561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304852091438.

The product of its (nonzero) digits is 174960000, while the sum is 64.

The spelling of 60665566156561 in words is "sixty trillion, six hundred sixty-five billion, five hundred sixty-six million, one hundred fifty-six thousand, five hundred sixty-one".