1866081686983 has 16 divisors (see below), whose sum is σ = 2011229412480. Its totient is φ = 1725095264256.

The previous prime is 1866081686969. The next prime is 1866081687047. The reversal of 1866081686983 is 3896861806681.

It is a cyclic number.

It is not a de Polignac number, because 1866081686983 - 2⁹ = 1866081686471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866081686923) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3340510 + ... + 3858907.

It is an arithmetic number, because the mean of its divisors is an integer number (125701838280).

Almost surely, 2^{1866081686983} is an apocalyptic number.

1866081686983 is a deficient number, since it is larger than the sum of its proper divisors (145147725497).

1866081686983 is a wasteful number, since it uses less digits than its factorization.

1866081686983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7199706.

The product of its (nonzero) digits is 143327232, while the sum is 70.

The spelling of 1866081686983 in words is "one trillion, eight hundred sixty-six billion, eighty-one million, six hundred eighty-six thousand, nine hundred eighty-three".