1966877195123 has 4 divisors (see below), whose sum is σ = 1967627627808. Its totient is φ = 1966126762440.

The previous prime is 1966877195099. The next prime is 1966877195131. The reversal of 1966877195123 is 3215917786691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1966877195123 - 2¹⁶ = 1966877129587 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1966877195123.

It is not an unprimeable number, because it can be changed into a prime (1966877194123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375212411 + ... + 375217652.

It is an arithmetic number, because the mean of its divisors is an integer number (491906906952).

Almost surely, 2^{1966877195123} is an apocalyptic number.

1966877195123 is a deficient number, since it is larger than the sum of its proper divisors (750432685).

1966877195123 is an equidigital number, since it uses as much as digits as its factorization.

1966877195123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750432684.

The product of its digits is 34292160, while the sum is 65.

The spelling of 1966877195123 in words is "one trillion, nine hundred sixty-six billion, eight hundred seventy-seven million, one hundred ninety-five thousand, one hundred twenty-three".