165673913357678 has 12 divisors (see below), whose sum is σ = 273156576156240. Its totient is φ = 75306324253380.

The previous prime is 165673913357663. The next prime is 165673913357713. The reversal of 165673913357678 is 876753319376561.

It is a junction number, because it is equal to n+sod(n) for n = 165673913357599 and 165673913357608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342301473638 + ... + 342301474121.

It is an arithmetic number, because the mean of its divisors is an integer number (22763048013020).

Almost surely, 2^{165673913357678} is an apocalyptic number.

165673913357678 is a deficient number, since it is larger than the sum of its proper divisors (107482662798562).

165673913357678 is a wasteful number, since it uses less digits than its factorization.

165673913357678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684602947783 (or 684602947772 counting only the distinct ones).

The product of its digits is 3600676800, while the sum is 77.

The spelling of 165673913357678 in words is "one hundred sixty-five trillion, six hundred seventy-three billion, nine hundred thirteen million, three hundred fifty-seven thousand, six hundred seventy-eight".