66403113 has 16 divisors (see below), whose sum is σ = 101364096. Its totient is φ = 37877760.

The previous prime is 66403091. The next prime is 66403121. The reversal of 66403113 is 31130466.

It is not a de Polignac number, because 66403113 - 2⁸ = 66402857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66403913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10995 + ... + 15927.

It is an arithmetic number, because the mean of its divisors is an integer number (6335256).

Almost surely, 2^66403113 is an apocalyptic number.

It is an amenable number.

66403113 is a deficient number, since it is larger than the sum of its proper divisors (34960983).

66403113 is a wasteful number, since it uses less digits than its factorization.

66403113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5584.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 66403113 is about 8148.8105266965. The cubic root of 66403113 is about 404.9450984869.

Adding to 66403113 its reverse (31130466), we get a palindrome (97533579).

The spelling of 66403113 in words is "sixty-six million, four hundred three thousand, one hundred thirteen".