60666565805 has 16 divisors (see below), whose sum is σ = 76731176880. Its totient is φ = 45975541248.

The previous prime is 60666565787. The next prime is 60666565807. The reversal of 60666565805 is 50856566606.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4373309161 + 56293256644 = 66131^2 + 237262^2 .

It is a cyclic number.

It is not a de Polignac number, because 60666565805 - 2⁶ = 60666565741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60666565807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3939392 + ... + 3954761.

It is an arithmetic number, because the mean of its divisors is an integer number (4795698555).

Almost surely, 2^60666565805 is an apocalyptic number.

It is an amenable number.

60666565805 is a deficient number, since it is larger than the sum of its proper divisors (16064611075).

60666565805 is a wasteful number, since it uses less digits than its factorization.

60666565805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7894240.

The product of its (nonzero) digits is 7776000, while the sum is 53.

The spelling of 60666565805 in words is "sixty billion, six hundred sixty-six million, five hundred sixty-five thousand, eight hundred five".