1166666778334 has 4 divisors (see below), whose sum is σ = 1750000167504. Its totient is φ = 583333389166.

The previous prime is 1166666778323. The next prime is 1166666778359. The reversal of 1166666778334 is 4338776666611.

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

It is a super-2 number, since 2×1166666778334² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291666694582 + ... + 291666694585.

It is an arithmetic number, because the mean of its divisors is an integer number (437500041876).

Almost surely, 2^{1166666778334} is an apocalyptic number.

1166666778334 is a deficient number, since it is larger than the sum of its proper divisors (583333389170).

1166666778334 is an equidigital number, since it uses as much as digits as its factorization.

1166666778334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583333389169.

The product of its digits is 109734912, while the sum is 64.

The spelling of 1166666778334 in words is "one trillion, one hundred sixty-six billion, six hundred sixty-six million, seven hundred seventy-eight thousand, three hundred thirty-four".