66740441 has 4 divisors (see below), whose sum is σ = 66777984. Its totient is φ = 66702900.

The previous prime is 66740437. The next prime is 66740519. The reversal of 66740441 is 14404766.

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 66740441 - 2² = 66740437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66740398 and 66740407.

It is not an unprimeable number, because it can be changed into a prime (66740041) 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, 15965 + ... + 19706.

It is an arithmetic number, because the mean of its divisors is an integer number (16694496).

Almost surely, 2^66740441 is an apocalyptic number.

It is an amenable number.

66740441 is a deficient number, since it is larger than the sum of its proper divisors (37543).

66740441 is a wasteful number, since it uses less digits than its factorization.

66740441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37542.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 66740441 is about 8169.4822969390. The cubic root of 66740441 is about 405.6296480324.

The spelling of 66740441 in words is "sixty-six million, seven hundred forty thousand, four hundred forty-one".