1966869660723 has 24 divisors (see below), whose sum is σ = 2960482267344. Its totient is φ = 1159824853440.

The previous prime is 1966869660673. The next prime is 1966869660739. The reversal of 1966869660723 is 3270669686691.

It is a happy number.

It is not a de Polignac number, because 1966869660723 - 2³² = 1962574693427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1966869660773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73207836 + ... + 73234697.

It is an arithmetic number, because the mean of its divisors is an integer number (123353427806).

Almost surely, 2^{1966869660723} is an apocalyptic number.

1966869660723 is a deficient number, since it is larger than the sum of its proper divisors (993612606621).

1966869660723 is a wasteful number, since it uses less digits than its factorization.

1966869660723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146442595 (or 146442584 counting only the distinct ones).

The product of its (nonzero) digits is 211631616, while the sum is 69.

The spelling of 1966869660723 in words is "one trillion, nine hundred sixty-six billion, eight hundred sixty-nine million, six hundred sixty thousand, seven hundred twenty-three".