60666666561 has 6 divisors (see below), whose sum is σ = 87629629490. Its totient is φ = 40444444368.

The previous prime is 60666666521. The next prime is 60666666629. The reversal of 60666666561 is 16566666606.

It can be written as a sum of positive squares in only one way, i.e., 55601640000 + 5065026561 = 235800^2 + 71169^2 .

It is not a de Polignac number, because 60666666561 - 2³¹ = 58519182913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 60666666498 and 60666666507.

It is not an unprimeable number, because it can be changed into a prime (60666666521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3370370356 + ... + 3370370373.

Almost surely, 2^60666666561 is an apocalyptic number.

It is an amenable number.

60666666561 is a deficient number, since it is larger than the sum of its proper divisors (26962962929).

60666666561 is a wasteful number, since it uses less digits than its factorization.

60666666561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6740740735 (or 6740740732 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 54.

The spelling of 60666666561 in words is "sixty billion, six hundred sixty-six million, six hundred sixty-six thousand, five hundred sixty-one".