66417331 has 8 divisors (see below), whose sum is σ = 71803280. Its totient is φ = 61220448.

The previous prime is 66417277. The next prime is 66417341. The reversal of 66417331 is 13371466.

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

It is a cyclic number.

It is not a de Polignac number, because 66417331 - 2⁷ = 66417203 is a prime.

It is a super-2 number, since 2×66417331² = 8822523714327122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66417293 and 66417302.

It is not an unprimeable number, because it can be changed into a prime (66417341) 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 7 ways as a sum of consecutive naturals, for example, 46536 + ... + 47941.

It is an arithmetic number, because the mean of its divisors is an integer number (8975410).

Almost surely, 2^66417331 is an apocalyptic number.

66417331 is a deficient number, since it is larger than the sum of its proper divisors (5385949).

66417331 is a wasteful number, since it uses less digits than its factorization.

66417331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94533.

The product of its digits is 9072, while the sum is 31.

The square root of 66417331 is about 8149.6828772658. The cubic root of 66417331 is about 404.9739982291.

Adding to 66417331 its reverse (13371466), we get a palindrome (79788797).

The spelling of 66417331 in words is "sixty-six million, four hundred seventeen thousand, three hundred thirty-one".