666754303457666 has 16 divisors (see below), whose sum is σ = 1005256084204608. Its totient is φ = 331672675849200.

The previous prime is 666754303457629. The next prime is 666754303457699.

666754303457666 is nontrivially palindromic in base 10.

666754303457666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×666754303457666² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 666754303457593 and 666754303457602.

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, 933090665 + ... + 933804956.

It is an arithmetic number, because the mean of its divisors is an integer number (62828505262788).

Almost surely, 2^{666754303457666} is an apocalyptic number.

666754303457666 is a deficient number, since it is larger than the sum of its proper divisors (338501780746942).

666754303457666 is a wasteful number, since it uses less digits than its factorization.

666754303457666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866896537.

The product of its (nonzero) digits is 8230118400, while the sum is 74.

The spelling of 666754303457666 in words is "six hundred sixty-six trillion, seven hundred fifty-four billion, three hundred three million, four hundred fifty-seven thousand, six hundred sixty-six".