669985589966 has 32 divisors (see below), whose sum is σ = 1293378140160. Its totient is φ = 252612914400.

The previous prime is 669985589929. The next prime is 669985589981.

669985589966 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70165481 + ... + 70175028.

It is an arithmetic number, because the mean of its divisors is an integer number (40418066880).

Almost surely, 2^669985589966 is an apocalyptic number.

669985589966 is a deficient number, since it is larger than the sum of its proper divisors (623392550194).

669985589966 is a wasteful number, since it uses less digits than its factorization.

669985589966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140340560.

The product of its digits is 13604889600, while the sum is 86.

The spelling of 669985589966 in words is "six hundred sixty-nine billion, nine hundred eighty-five million, five hundred eighty-nine thousand, nine hundred sixty-six".