669808683773 has 4 divisors (see below), whose sum is σ = 672683399388. Its totient is φ = 666933968160.

The previous prime is 669808683767. The next prime is 669808683779. The reversal of 669808683773 is 377386808966.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (669808683767) and next prime (669808683779).

It can be written as a sum of positive squares in 2 ways, for example, as 171198992644 + 498609691129 = 413762^2 + 706123^2 .

It is a cyclic number.

It is not a de Polignac number, because 669808683773 - 2¹⁸ = 669808421629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 669808683697 and 669808683706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669808683779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1437357458 + ... + 1437357923.

It is an arithmetic number, because the mean of its divisors is an integer number (168170849847).

Almost surely, 2^669808683773 is an apocalyptic number.

It is an amenable number.

669808683773 is a deficient number, since it is larger than the sum of its proper divisors (2874715615).

669808683773 is a wasteful number, since it uses less digits than its factorization.

669808683773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2874715614.

The product of its (nonzero) digits is 438939648, while the sum is 71.

The spelling of 669808683773 in words is "six hundred sixty-nine billion, eight hundred eight million, six hundred eighty-three thousand, seven hundred seventy-three".