1666666835002 has 16 divisors (see below), whose sum is σ = 2692329415272. Its totient is φ = 769224718080.

The previous prime is 1666666834997. The next prime is 1666666835023. The reversal of 1666666835002 is 2005386666661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 519666532641 + 1147000302361 = 720879^2 + 1070981^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5628718 + ... + 5917414.

Almost surely, 2^{1666666835002} is an apocalyptic number.

1666666835002 is a deficient number, since it is larger than the sum of its proper divisors (1025662580270).

1666666835002 is a wasteful number, since it uses less digits than its factorization.

1666666835002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510753.

The product of its (nonzero) digits is 11197440, while the sum is 55.

The spelling of 1666666835002 in words is "one trillion, six hundred sixty-six billion, six hundred sixty-six million, eight hundred thirty-five thousand, two".