66103401 has 24 divisors (see below), whose sum is σ = 110417664. Its totient is φ = 34866720.

The previous prime is 66103393. The next prime is 66103417. The reversal of 66103401 is 10430166.

66103401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66103401 - 2³ = 66103393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66103481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15385 + ... + 19206.

It is an arithmetic number, because the mean of its divisors is an integer number (4600736).

Almost surely, 2^66103401 is an apocalyptic number.

It is an amenable number.

66103401 is a deficient number, since it is larger than the sum of its proper divisors (44314263).

66103401 is a wasteful number, since it uses less digits than its factorization.

66103401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34621 (or 34614 counting only the distinct ones).

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

The square root of 66103401 is about 8130.3998056676. The cubic root of 66103401 is about 404.3349365203.

Adding to 66103401 its reverse (10430166), we get a palindrome (76533567).

It can be divided in two parts, 6610 and 3401, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 66103401 in words is "sixty-six million, one hundred three thousand, four hundred one".