1966698223903 has 12 divisors (see below), whose sum is σ = 2408201907960. Its totient is φ = 1597018105872.

The previous prime is 1966698223901. The next prime is 1966698223907. The reversal of 1966698223903 is 3093228966691.

It is not a de Polignac number, because 1966698223903 - 2¹ = 1966698223901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966698223901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1056227976 + ... + 1056229837.

It is an arithmetic number, because the mean of its divisors is an integer number (200683492330).

Almost surely, 2^{1966698223903} is an apocalyptic number.

1966698223903 is a deficient number, since it is larger than the sum of its proper divisors (441503684057).

1966698223903 is a wasteful number, since it uses less digits than its factorization.

1966698223903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112457846 (or 2112457839 counting only the distinct ones).

The product of its (nonzero) digits is 45349632, while the sum is 64.

The spelling of 1966698223903 in words is "one trillion, nine hundred sixty-six billion, six hundred ninety-eight million, two hundred twenty-three thousand, nine hundred three".