66533441 has 12 divisors (see below), whose sum is σ = 73045548. Its totient is φ = 60562944.

The previous prime is 66533419. The next prime is 66533449. The reversal of 66533441 is 14433566.

It can be written as a sum of positive squares in 6 ways, for example, as 355216 + 66178225 = 596^2 + 8135^2 .

It is not a de Polignac number, because 66533441 - 2⁶ = 66533377 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66533398 and 66533407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66533449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9641 + ... + 15033.

It is an arithmetic number, because the mean of its divisors is an integer number (6087129).

Almost surely, 2^66533441 is an apocalyptic number.

It is an amenable number.

66533441 is a deficient number, since it is larger than the sum of its proper divisors (6512107).

66533441 is a wasteful number, since it uses less digits than its factorization.

66533441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5492 (or 5479 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 66533441 is about 8156.8033567078. The cubic root of 66533441 is about 405.2098511105.

The spelling of 66533441 in words is "sixty-six million, five hundred thirty-three thousand, four hundred forty-one".