76666121 has 16 divisors (see below), whose sum is σ = 92607360. Its totient is φ = 62000640.

The previous prime is 76666099. The next prime is 76666127. The reversal of 76666121 is 12166667.

It is a cyclic number.

It is not a de Polignac number, because 76666121 - 2¹⁰ = 76665097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (76666127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35801 + ... + 37881.

It is an arithmetic number, because the mean of its divisors is an integer number (5787960).

Almost surely, 2^76666121 is an apocalyptic number.

It is an amenable number.

76666121 is a deficient number, since it is larger than the sum of its proper divisors (15941239).

76666121 is a wasteful number, since it uses less digits than its factorization.

76666121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384.

The product of its digits is 18144, while the sum is 35.

The square root of 76666121 is about 8755.9191978912. The cubic root of 76666121 is about 424.8162915368.

The spelling of 76666121 in words is "seventy-six million, six hundred sixty-six thousand, one hundred twenty-one".