66225743 has 4 divisors (see below), whose sum is σ = 66242208. Its totient is φ = 66209280.

The previous prime is 66225739. The next prime is 66225769. The reversal of 66225743 is 34752266.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66225743 - 2² = 66225739 is a prime.

It is a super-3 number, since 3×66225743³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66225713) 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, 2255 + ... + 11727.

It is an arithmetic number, because the mean of its divisors is an integer number (16560552).

Almost surely, 2^66225743 is an apocalyptic number.

66225743 is a deficient number, since it is larger than the sum of its proper divisors (16465).

66225743 is an equidigital number, since it uses as much as digits as its factorization.

66225743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16464.

The product of its digits is 60480, while the sum is 35.

The square root of 66225743 is about 8137.9200659628. The cubic root of 66225743 is about 404.5842260576.

The spelling of 66225743 in words is "sixty-six million, two hundred twenty-five thousand, seven hundred forty-three".