66668411486666 has 16 divisors (see below), whose sum is σ = 109561977839808. Its totient is φ = 30173764072800.

The previous prime is 66668411486653. The next prime is 66668411486681.

66668411486666 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66668411486593 and 66668411486602.

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, 6502961270 + ... + 6502971521.

It is an arithmetic number, because the mean of its divisors is an integer number (6847623614988).

Almost surely, 2^{66668411486666} is an apocalyptic number.

66668411486666 is a deficient number, since it is larger than the sum of its proper divisors (42893566353142).

66668411486666 is a wasteful number, since it uses less digits than its factorization.

66668411486666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13005933037.

The product of its digits is 1719926784, while the sum is 74.

The spelling of 66668411486666 in words is "sixty-six trillion, six hundred sixty-eight billion, four hundred eleven million, four hundred eighty-six thousand, six hundred sixty-six".