665656811006 has 16 divisors (see below), whose sum is σ = 1089300780288. Its totient is φ = 302559005400.

The previous prime is 665656810991. The next prime is 665656811009. The reversal of 665656811006 is 600118656566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665656811009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47270 + ... + 1154793.

It is an arithmetic number, because the mean of its divisors is an integer number (68081298768).

Almost surely, 2^665656811006 is an apocalyptic number.

665656811006 is a deficient number, since it is larger than the sum of its proper divisors (423643969282).

665656811006 is a wasteful number, since it uses less digits than its factorization.

665656811006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227247.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 665656811006 in words is "six hundred sixty-five billion, six hundred fifty-six million, eight hundred eleven thousand, six".