1666502671083 has 4 divisors (see below), whose sum is σ = 2222003561448. Its totient is φ = 1111001780720.

The previous prime is 1666502671069. The next prime is 1666502671091. The reversal of 1666502671083 is 3801762056661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1666502671083 - 2¹⁷ = 1666502540011 is a prime.

It is a super-3 number, since 3×1666502671083³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1666502671003) 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 3 ways as a sum of consecutive naturals, for example, 277750445178 + ... + 277750445183.

It is an arithmetic number, because the mean of its divisors is an integer number (555500890362).

Almost surely, 2^{1666502671083} is an apocalyptic number.

1666502671083 is a deficient number, since it is larger than the sum of its proper divisors (555500890365).

1666502671083 is an equidigital number, since it uses as much as digits as its factorization.

1666502671083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555500890364.

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 1666502671083 in words is "one trillion, six hundred sixty-six billion, five hundred two million, six hundred seventy-one thousand, eighty-three".