60666727681 has 4 divisors (see below), whose sum is σ = 69333403072. Its totient is φ = 52000052292.

The previous prime is 60666727679. The next prime is 60666727687. The reversal of 60666727681 is 18672766606.

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 60666727681 - 2¹ = 60666727679 is a prime.

It is a super-2 number, since 2×60666727681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60666727687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4333337685 + ... + 4333337698.

It is an arithmetic number, because the mean of its divisors is an integer number (17333350768).

Almost surely, 2^60666727681 is an apocalyptic number.

It is an amenable number.

60666727681 is a deficient number, since it is larger than the sum of its proper divisors (8666675391).

60666727681 is an equidigital number, since it uses as much as digits as its factorization.

60666727681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8666675390.

The product of its (nonzero) digits is 6096384, while the sum is 55.

The spelling of 60666727681 in words is "sixty billion, six hundred sixty-six million, seven hundred twenty-seven thousand, six hundred eighty-one".