121996766 has 4 divisors (see below), whose sum is σ = 182995152. Its totient is φ = 60998382.

The previous prime is 121996759. The next prime is 121996813. The reversal of 121996766 is 667699121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 667699121 = 19 ⋅35142059.

It is a self number, because there is not a number n which added to its sum of digits gives 121996766.

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, 30499190 + ... + 30499193.

It is an arithmetic number, because the mean of its divisors is an integer number (45748788).

Almost surely, 2^121996766 is an apocalyptic number.

121996766 is a deficient number, since it is larger than the sum of its proper divisors (60998386).

121996766 is an equidigital number, since it uses as much as digits as its factorization.

121996766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60998385.

The product of its digits is 244944, while the sum is 47.

The square root of 121996766 is about 11045.2146199157. The cubic root of 121996766 is about 495.9631839436.

The spelling of 121996766 in words is "one hundred twenty-one million, nine hundred ninety-six thousand, seven hundred sixty-six".