2042531666 has 16 divisors (see below), whose sum is σ = 3540827520. Its totient is φ = 865534560.

The previous prime is 2042531663. The next prime is 2042531677. The reversal of 2042531666 is 6661352402.

It is a happy number.

It is a super-2 number, since 2×2042531666² = 8343871213225471112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2042531663) 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 7 ways as a sum of consecutive naturals, for example, 818390 + ... + 820881.

It is an arithmetic number, because the mean of its divisors is an integer number (221301720).

Almost surely, 2^2042531666 is an apocalyptic number.

2042531666 is a deficient number, since it is larger than the sum of its proper divisors (1498295854).

2042531666 is a wasteful number, since it uses less digits than its factorization.

2042531666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639369.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 2042531666 is about 45194.3764864612. The cubic root of 2042531666 is about 1268.7895685978.

The spelling of 2042531666 in words is "two billion, forty-two million, five hundred thirty-one thousand, six hundred sixty-six".