1666816533006 has 16 divisors (see below), whose sum is σ = 3368000418384. Its totient is φ = 549877618944.

The previous prime is 1666816532981. The next prime is 1666816533007. The reversal of 1666816533006 is 6003356186661.

It is a self number, because there is not a number n which added to its sum of digits gives 1666816533006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666816533007) 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, 1431972385 + ... + 1431973548.

It is an arithmetic number, because the mean of its divisors is an integer number (210500026149).

Almost surely, 2^{1666816533006} is an apocalyptic number.

1666816533006 is an abundant number, since it is smaller than the sum of its proper divisors (1701183885378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666816533006 is a wasteful number, since it uses less digits than its factorization.

1666816533006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863946035.

The product of its (nonzero) digits is 2799360, while the sum is 51.

The spelling of 1666816533006 in words is "one trillion, six hundred sixty-six billion, eight hundred sixteen million, five hundred thirty-three thousand, six".