66743441 has 4 divisors (see below), whose sum is σ = 66822000. Its totient is φ = 66664884.

The previous prime is 66743437. The next prime is 66743461. The reversal of 66743441 is 14434766.

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 66743441 - 2² = 66743437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66743461) 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, 37991 + ... + 39708.

It is an arithmetic number, because the mean of its divisors is an integer number (16705500).

Almost surely, 2^66743441 is an apocalyptic number.

It is an amenable number.

66743441 is a deficient number, since it is larger than the sum of its proper divisors (78559).

66743441 is an equidigital number, since it uses as much as digits as its factorization.

66743441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78558.

The product of its digits is 48384, while the sum is 35.

The square root of 66743441 is about 8169.6659050416. The cubic root of 66743441 is about 405.6357256604.

The spelling of 66743441 in words is "sixty-six million, seven hundred forty-three thousand, four hundred forty-one".