2066506403 has 8 divisors (see below), whose sum is σ = 2226684096. Its totient is φ = 1906502400.

The previous prime is 2066506381. The next prime is 2066506471. The reversal of 2066506403 is 3046056602.

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 2066506403 - 2¹⁸ = 2066244259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2066506403.

It is not an unprimeable number, because it can be changed into a prime (2066506483) 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, 18158 + ... + 66803.

It is an arithmetic number, because the mean of its divisors is an integer number (278335512).

Almost surely, 2^2066506403 is an apocalyptic number.

2066506403 is a deficient number, since it is larger than the sum of its proper divisors (160177693).

2066506403 is a wasteful number, since it uses less digits than its factorization.

2066506403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86845.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 2066506403 is about 45458.8429571189. The cubic root of 2066506403 is about 1273.7345184170.

The spelling of 2066506403 in words is "two billion, sixty-six million, five hundred six thousand, four hundred three".