66103243 has 4 divisors (see below), whose sum is σ = 67350528. Its totient is φ = 64855960.

The previous prime is 66103231. The next prime is 66103273. The reversal of 66103243 is 34230166.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66103243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66103273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623563 + ... + 623668.

It is an arithmetic number, because the mean of its divisors is an integer number (16837632).

Almost surely, 2^66103243 is an apocalyptic number.

66103243 is a deficient number, since it is larger than the sum of its proper divisors (1247285).

66103243 is a wasteful number, since it uses less digits than its factorization.

66103243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247284.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 66103243 is about 8130.3900890425. The cubic root of 66103243 is about 404.3346143736.

The spelling of 66103243 in words is "sixty-six million, one hundred three thousand, two hundred forty-three".