2145142666 has 16 divisors (see below), whose sum is σ = 3229133760. Its totient is φ = 1068772320.

The previous prime is 2145142631. The next prime is 2145142669. The reversal of 2145142666 is 6662415412.

It is not an unprimeable number, because it can be changed into a prime (2145142669) 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, 901270 + ... + 903646.

It is an arithmetic number, because the mean of its divisors is an integer number (201820860).

Almost surely, 2^2145142666 is an apocalyptic number.

2145142666 is a deficient number, since it is larger than the sum of its proper divisors (1083991094).

2145142666 is a wasteful number, since it uses less digits than its factorization.

2145142666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789.

The product of its digits is 69120, while the sum is 37.

The square root of 2145142666 is about 46315.6848810422. The cubic root of 2145142666 is about 1289.6901817917.

The spelling of 2145142666 in words is "two billion, one hundred forty-five million, one hundred forty-two thousand, six hundred sixty-six".