1666685368370 has 32 divisors (see below), whose sum is σ = 3273139449216. Its totient is φ = 605997878400.

The previous prime is 1666685368291. The next prime is 1666685368457. The reversal of 1666685368370 is 738635866661.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 1666685368297 and 1666685368306.

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, 98987 + ... + 1828433.

It is an arithmetic number, because the mean of its divisors is an integer number (102285607788).

Almost surely, 2^{1666685368370} is an apocalyptic number.

1666685368370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666685368370 is a deficient number, since it is larger than the sum of its proper divisors (1606454080846).

1666685368370 is a wasteful number, since it uses less digits than its factorization.

1666685368370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738226.

The product of its (nonzero) digits is 156764160, while the sum is 65.

The spelling of 1666685368370 in words is "one trillion, six hundred sixty-six billion, six hundred eighty-five million, three hundred sixty-eight thousand, three hundred seventy".