1766616666993 has 6 divisors (see below), whose sum is σ = 2551779630114. Its totient is φ = 1177744444656.

The previous prime is 1766616666961. The next prime is 1766616667009. The reversal of 1766616666993 is 3996666166671.

It can be written as a sum of positive squares in only one way, i.e., 1047627990369 + 718988676624 = 1023537^2 + 847932^2 .

It is not a de Polignac number, because 1766616666993 - 2⁵ = 1766616666961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1766616666593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98145370380 + ... + 98145370397.

It is an arithmetic number, because the mean of its divisors is an integer number (425296605019).

Almost surely, 2^{1766616666993} is an apocalyptic number.

It is an amenable number.

1766616666993 is a deficient number, since it is larger than the sum of its proper divisors (785162963121).

1766616666993 is a wasteful number, since it uses less digits than its factorization.

1766616666993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196290740783 (or 196290740780 counting only the distinct ones).

The product of its digits is 476171136, while the sum is 72.

The spelling of 1766616666993 in words is "one trillion, seven hundred sixty-six billion, six hundred sixteen million, six hundred sixty-six thousand, nine hundred ninety-three".