66170743 has 4 divisors (see below), whose sum is σ = 66202488. Its totient is φ = 66139000.

The previous prime is 66170719. The next prime is 66170759. The reversal of 66170743 is 34707166.

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 66170743 - 2¹⁷ = 66039671 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66170699 and 66170708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66170773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12508 + ... + 16993.

It is an arithmetic number, because the mean of its divisors is an integer number (16550622).

Almost surely, 2^66170743 is an apocalyptic number.

66170743 is a deficient number, since it is larger than the sum of its proper divisors (31745).

66170743 is a wasteful number, since it uses less digits than its factorization.

66170743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31744.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 66170743 is about 8134.5401222196. The cubic root of 66170743 is about 404.4721936145.

The spelling of 66170743 in words is "sixty-six million, one hundred seventy thousand, seven hundred forty-three".