1666014406 has 24 divisors (see below), whose sum is σ = 2911435056. Its totient is φ = 712923120.

The previous prime is 1666014401. The next prime is 1666014421. The reversal of 1666014406 is 6044106661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666014401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53791 + ... + 78901.

It is an arithmetic number, because the mean of its divisors is an integer number (121309794).

Almost surely, 2^1666014406 is an apocalyptic number.

1666014406 is a deficient number, since it is larger than the sum of its proper divisors (1245420650).

1666014406 is a wasteful number, since it uses less digits than its factorization.

1666014406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25804 (or 25797 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1666014406 is about 40816.8397355797. The cubic root of 1666014406 is about 1185.4764132090.

The spelling of 1666014406 in words is "one billion, six hundred sixty-six million, fourteen thousand, four hundred six".