2666859351766 has 16 divisors (see below), whose sum is σ = 4218614008560. Its totient is φ = 1260914130720.

The previous prime is 2666859351733. The next prime is 2666859351809. The reversal of 2666859351766 is 6671539586662.

It is a super-2 number, since 2×2666859351766² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2666859351695 and 2666859351704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64841281 + ... + 64882396.

It is an arithmetic number, because the mean of its divisors is an integer number (263663375535).

Almost surely, 2^{2666859351766} is an apocalyptic number.

2666859351766 is a deficient number, since it is larger than the sum of its proper divisors (1551754656794).

2666859351766 is a wasteful number, since it uses less digits than its factorization.

2666859351766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129724239.

The product of its digits is 587865600, while the sum is 70.

The spelling of 2666859351766 in words is "two trillion, six hundred sixty-six billion, eight hundred fifty-nine million, three hundred fifty-one thousand, seven hundred sixty-six".