2006656423 has 4 divisors (see below), whose sum is σ = 2010221208. Its totient is φ = 2003091640.

The previous prime is 2006656411. The next prime is 2006656429. The reversal of 2006656423 is 3246566002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3246566002 = 2 ⋅1623283001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2006656423 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 (2006656429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1781548 + ... + 1782673.

It is an arithmetic number, because the mean of its divisors is an integer number (502555302).

Almost surely, 2^2006656423 is an apocalyptic number.

2006656423 is a deficient number, since it is larger than the sum of its proper divisors (3564785).

2006656423 is an equidigital number, since it uses as much as digits as its factorization.

2006656423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564784.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 2006656423 is about 44795.7188021355. The cubic root of 2006656423 is about 1261.3172633165.

The spelling of 2006656423 in words is "two billion, six million, six hundred fifty-six thousand, four hundred twenty-three".