66426043903 has 8 divisors (see below), whose sum is σ = 67167979200. Its totient is φ = 65685760800.

The previous prime is 66426043891. The next prime is 66426043907. The reversal of 66426043903 is 30934062466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66426043903 - 2¹⁷ = 66425912831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66426043903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66426043907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332103 + ... + 493096.

It is an arithmetic number, because the mean of its divisors is an integer number (8395997400).

Almost surely, 2^66426043903 is an apocalyptic number.

66426043903 is a deficient number, since it is larger than the sum of its proper divisors (741935297).

66426043903 is a wasteful number, since it uses less digits than its factorization.

66426043903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826097.

The product of its (nonzero) digits is 559872, while the sum is 43.

The spelling of 66426043903 in words is "sixty-six billion, four hundred twenty-six million, forty-three thousand, nine hundred three".