1966308680386 has 8 divisors (see below), whose sum is σ = 2949478960140. Its totient is φ = 983149027008.

The previous prime is 1966308680383. The next prime is 1966308680419. The reversal of 1966308680386 is 6830868036691.

It can be written as a sum of positive squares in 2 ways, for example, as 1584237582225 + 382071098161 = 1258665^2 + 618119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1966308680386² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1966308680383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2176651 + ... + 2944558.

Almost surely, 2^{1966308680386} is an apocalyptic number.

1966308680386 is a deficient number, since it is larger than the sum of its proper divisors (983170279754).

1966308680386 is a wasteful number, since it uses less digits than its factorization.

1966308680386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313188.

The product of its (nonzero) digits is 53747712, while the sum is 64.

The spelling of 1966308680386 in words is "one trillion, nine hundred sixty-six billion, three hundred eight million, six hundred eighty thousand, three hundred eighty-six".