669386683966 has 48 divisors (see below), whose sum is σ = 1372209294960. Its totient is φ = 240738462720.

The previous prime is 669386683939. The next prime is 669386684011.

669386683966 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×669386683966² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 669386683892 and 669386683901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23868771 + ... + 23896798.

It is an arithmetic number, because the mean of its divisors is an integer number (28587693645).

Almost surely, 2^669386683966 is an apocalyptic number.

669386683966 is an abundant number, since it is smaller than the sum of its proper divisors (702822610994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669386683966 is a wasteful number, since it uses less digits than its factorization.

669386683966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47765609 (or 47765602 counting only the distinct ones).

The product of its digits is 2176782336, while the sum is 76.

The spelling of 669386683966 in words is "six hundred sixty-nine billion, three hundred eighty-six million, six hundred eighty-three thousand, nine hundred sixty-six".