66403101 has 4 divisors (see below), whose sum is σ = 88537472. Its totient is φ = 44268732.

The previous prime is 66403091. The next prime is 66403121. The reversal of 66403101 is 10130466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 66403101 - 2¹¹ = 66401053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66403121) 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 3 ways as a sum of consecutive naturals, for example, 11067181 + ... + 11067186.

It is an arithmetic number, because the mean of its divisors is an integer number (22134368).

Almost surely, 2^66403101 is an apocalyptic number.

It is an amenable number.

66403101 is a deficient number, since it is larger than the sum of its proper divisors (22134371).

66403101 is a wasteful number, since it uses less digits than its factorization.

66403101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22134370.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 66403101 is about 8148.8097903927. The cubic root of 66403101 is about 404.9450740938.

Adding to 66403101 its reverse (10130466), we get a palindrome (76533567).

The spelling of 66403101 in words is "sixty-six million, four hundred three thousand, one hundred one".