66008403 has 12 divisors (see below), whose sum is σ = 96329688. Its totient is φ = 43551360.

The previous prime is 66008389. The next prime is 66008417. The reversal of 66008403 is 30480066.

It is an interprime number because it is at equal distance from previous prime (66008389) and next prime (66008417).

It is not a de Polignac number, because 66008403 - 2⁶ = 66008339 is a prime.

It is a super-2 number, since 2×66008403² = 8714218533220818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66009403) 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 11 ways as a sum of consecutive naturals, for example, 36933 + ... + 38678.

It is an arithmetic number, because the mean of its divisors is an integer number (8027474).

Almost surely, 2^66008403 is an apocalyptic number.

66008403 is a deficient number, since it is larger than the sum of its proper divisors (30321285).

66008403 is a wasteful number, since it uses less digits than its factorization.

66008403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75714 (or 75711 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66008403 is about 8124.5555570751. Note that the first 5 decimals coincide. The cubic root of 66008403 is about 404.1411521121.

Adding to 66008403 its reverse (30480066), we get a palindrome (96488469).

The spelling of 66008403 in words is "sixty-six million, eight thousand, four hundred three".