66074743 has 4 divisors (see below), whose sum is σ = 75514000. Its totient is φ = 56635488.

The previous prime is 66074741. The next prime is 66074803. The reversal of 66074743 is 34747066.

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

It is not a de Polignac number, because 66074743 - 2¹ = 66074741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66074741) 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, 4719618 + ... + 4719631.

It is an arithmetic number, because the mean of its divisors is an integer number (18878500).

Almost surely, 2^66074743 is an apocalyptic number.

66074743 is a deficient number, since it is larger than the sum of its proper divisors (9439257).

66074743 is an equidigital number, since it uses as much as digits as its factorization.

66074743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9439256.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 66074743 is about 8128.6372166557. The cubic root of 66074743 is about 404.2764972400.

The spelling of 66074743 in words is "sixty-six million, seventy-four thousand, seven hundred forty-three".