1666424104351 has 4 divisors (see below), whose sum is σ = 1672312529032. Its totient is φ = 1660535679672.

The previous prime is 1666424104273. The next prime is 1666424104381. The reversal of 1666424104351 is 1534014246661.

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 1666424104351 - 2¹³ = 1666424096159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1666424104298 and 1666424104307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666424104381) 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, 2944211916 + ... + 2944212481.

It is an arithmetic number, because the mean of its divisors is an integer number (418078132258).

Almost surely, 2^{1666424104351} is an apocalyptic number.

1666424104351 is a deficient number, since it is larger than the sum of its proper divisors (5888424681).

1666424104351 is an equidigital number, since it uses as much as digits as its factorization.

1666424104351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5888424680.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 1666424104351 in words is "one trillion, six hundred sixty-six billion, four hundred twenty-four million, one hundred four thousand, three hundred fifty-one".