2066689042 has 16 divisors (see below), whose sum is σ = 3387393792. Its totient is φ = 937865520.

The previous prime is 2066689021. The next prime is 2066689043. The reversal of 2066689042 is 2409866602.

It is a self number, because there is not a number n which added to its sum of digits gives 2066689042.

It is not an unprimeable number, because it can be changed into a prime (2066689043) 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, 63138 + ... + 90109.

It is an arithmetic number, because the mean of its divisors is an integer number (211712112).

Almost surely, 2^2066689042 is an apocalyptic number.

2066689042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2066689042 is a deficient number, since it is larger than the sum of its proper divisors (1320704750).

2066689042 is a wasteful number, since it uses less digits than its factorization.

2066689042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153873.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 2066689042 is about 45460.8517518095. The cubic root of 2066689042 is about 1273.7720417696.

The spelling of 2066689042 in words is "two billion, sixty-six million, six hundred eighty-nine thousand, forty-two".