1166666121 has 24 divisors (see below), whose sum is σ = 1741259520. Its totient is φ = 751946400.

The previous prime is 1166666119. The next prime is 1166666141. The reversal of 1166666121 is 1216666611.

It is a happy number.

It is not a de Polignac number, because 1166666121 - 2¹ = 1166666119 is a prime.

It is a super-2 number, since 2×1166666121² = 2722219675778373282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1166666141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504115 + ... + 506423.

It is an arithmetic number, because the mean of its divisors is an integer number (72552480).

Almost surely, 2^1166666121 is an apocalyptic number.

It is an amenable number.

1166666121 is a deficient number, since it is larger than the sum of its proper divisors (574593399).

1166666121 is a wasteful number, since it uses less digits than its factorization.

1166666121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4157 (or 4154 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1166666121 is about 34156.4945654556. The cubic root of 1166666121 is about 1052.7264354843.

The spelling of 1166666121 in words is "one billion, one hundred sixty-six million, six hundred sixty-six thousand, one hundred twenty-one".