66427733 has 4 divisors (see below), whose sum is σ = 67972608. Its totient is φ = 64882860.

The previous prime is 66427727. The next prime is 66427747. The reversal of 66427733 is 33772466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66427733 - 2¹⁰ = 66426709 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 (66427723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772373 + ... + 772458.

It is an arithmetic number, because the mean of its divisors is an integer number (16993152).

Almost surely, 2^66427733 is an apocalyptic number.

It is an amenable number.

66427733 is a deficient number, since it is larger than the sum of its proper divisors (1544875).

66427733 is a wasteful number, since it uses less digits than its factorization.

66427733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544874.

The product of its digits is 127008, while the sum is 38.

The square root of 66427733 is about 8150.3210366218. The cubic root of 66427733 is about 404.9951388940.

The spelling of 66427733 in words is "sixty-six million, four hundred twenty-seven thousand, seven hundred thirty-three".