66535441 has 4 divisors (see below), whose sum is σ = 76040512. Its totient is φ = 57030372.

The previous prime is 66535387. The next prime is 66535463. The reversal of 66535441 is 14453566.

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 not a de Polignac number, because 66535441 - 2²⁵ = 32981009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66535397 and 66535406.

It is not an unprimeable number, because it can be changed into a prime (66535471) 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, 4752525 + ... + 4752538.

It is an arithmetic number, because the mean of its divisors is an integer number (19010128).

Almost surely, 2^66535441 is an apocalyptic number.

It is an amenable number.

66535441 is a deficient number, since it is larger than the sum of its proper divisors (9505071).

66535441 is an equidigital number, since it uses as much as digits as its factorization.

66535441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9505070.

The product of its digits is 43200, while the sum is 34.

The square root of 66535441 is about 8156.9259528330. The cubic root of 66535441 is about 405.2139112822.

The spelling of 66535441 in words is "sixty-six million, five hundred thirty-five thousand, four hundred forty-one".