166103344543 has 4 divisors (see below), whose sum is σ = 166110326208. Its totient is φ = 166096362880.

The previous prime is 166103344531. The next prime is 166103344579. The reversal of 166103344543 is 345443301661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345443301661 = 811 ⋅425947351.

It is a cyclic number.

It is not a de Polignac number, because 166103344543 - 2¹³ = 166103336351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166103344496 and 166103344505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166103344343) 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, 3455023 + ... + 3502768.

It is an arithmetic number, because the mean of its divisors is an integer number (41527581552).

Almost surely, 2^166103344543 is an apocalyptic number.

166103344543 is a deficient number, since it is larger than the sum of its proper divisors (6981665).

166103344543 is an equidigital number, since it uses as much as digits as its factorization.

166103344543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6981664.

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 166103344543 in words is "one hundred sixty-six billion, one hundred three million, three hundred forty-four thousand, five hundred forty-three".