669190091966 has 16 divisors (see below), whose sum is σ = 1095748069248. Its totient is φ = 303980165400.

The previous prime is 669190091923. The next prime is 669190091987.

669190091966 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 669190091899 and 669190091908.

It is a congruent number.

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, 9822740 + ... + 9890631.

It is an arithmetic number, because the mean of its divisors is an integer number (68484254328).

Almost surely, 2^669190091966 is an apocalyptic number.

669190091966 is a deficient number, since it is larger than the sum of its proper divisors (426557977282).

669190091966 is a wasteful number, since it uses less digits than its factorization.

669190091966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19714927.

The product of its (nonzero) digits is 8503056, while the sum is 62.

The spelling of 669190091966 in words is "six hundred sixty-nine billion, one hundred ninety million, ninety-one thousand, nine hundred sixty-six".