66525041 has 4 divisors (see below), whose sum is σ = 72572784. Its totient is φ = 60477300.

The previous prime is 66525007. The next prime is 66525047. The reversal of 66525041 is 14052566.

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 a de Polignac number, because none of the positive numbers 2^k-66525041 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 = 66524995 and 66525013.

It is not an unprimeable number, because it can be changed into a prime (66525047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3023855 + ... + 3023876.

It is an arithmetic number, because the mean of its divisors is an integer number (18143196).

Almost surely, 2^66525041 is an apocalyptic number.

It is an amenable number.

66525041 is a deficient number, since it is larger than the sum of its proper divisors (6047743).

66525041 is a wasteful number, since it uses less digits than its factorization.

66525041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6047742.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 66525041 is about 8156.2884328596. The cubic root of 66525041 is about 405.1927975008.

The spelling of 66525041 in words is "sixty-six million, five hundred twenty-five thousand, forty-one".