66506241 has 8 divisors (see below), whose sum is σ = 89488960. Its totient is φ = 43930512.

The previous prime is 66506201. The next prime is 66506243. The reversal of 66506241 is 14260566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66506241 - 2⁷ = 66506113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66506199 and 66506208.

It is not an unprimeable number, because it can be changed into a prime (66506243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101365 + ... + 102018.

It is an arithmetic number, because the mean of its divisors is an integer number (11186120).

Almost surely, 2^66506241 is an apocalyptic number.

It is an amenable number.

66506241 is a deficient number, since it is larger than the sum of its proper divisors (22982719).

66506241 is a wasteful number, since it uses less digits than its factorization.

66506241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203495.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66506241 is about 8155.1358664341. The cubic root of 66506241 is about 405.1546246957.

The spelling of 66506241 in words is "sixty-six million, five hundred six thousand, two hundred forty-one".