66600103 has 8 divisors (see below), whose sum is σ = 67449872. Its totient is φ = 65753856.

The previous prime is 66600097. The next prime is 66600119. The reversal of 66600103 is 30100666.

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 66600103 - 2⁵ = 66600071 is a prime.

It is a super-2 number, since 2×66600103² = 8871147439221218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66600173) 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, 72976 + ... + 73882.

It is an arithmetic number, because the mean of its divisors is an integer number (8431234).

Almost surely, 2^66600103 is an apocalyptic number.

66600103 is a deficient number, since it is larger than the sum of its proper divisors (849769).

66600103 is an equidigital number, since it uses as much as digits as its factorization.

66600103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 66600103 is about 8160.8886158310. Note that the first 3 decimals coincide. The cubic root of 66600103 is about 405.3451368770.

Adding to 66600103 its reverse (30100666), we get a palindrome (96700769).

The spelling of 66600103 in words is "sixty-six million, six hundred thousand, one hundred three".