406066666689 has 6 divisors (see below), whose sum is σ = 586540740786. Its totient is φ = 270711111120.

The previous prime is 406066666651. The next prime is 406066666693. The reversal of 406066666689 is 986666660604.

It can be written as a sum of positive squares in only one way, i.e., 383925226689 + 22141440000 = 619617^2 + 148800^2 .

It is not a de Polignac number, because 406066666689 - 2¹² = 406066662593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (406066666589) 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, 22559259252 + ... + 22559259269.

It is an arithmetic number, because the mean of its divisors is an integer number (97756790131).

Almost surely, 2^406066666689 is an apocalyptic number.

It is an amenable number.

406066666689 is a deficient number, since it is larger than the sum of its proper divisors (180474074097).

406066666689 is a wasteful number, since it uses less digits than its factorization.

406066666689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45118518527 (or 45118518524 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 63.

The spelling of 406066666689 in words is "four hundred six billion, sixty-six million, six hundred sixty-six thousand, six hundred eighty-nine".