121366661 has 32 divisors (see below), whose sum is σ = 143216640. Its totient is φ = 101896704.

The previous prime is 121366657. The next prime is 121366669. The reversal of 121366661 is 166663121.

It is not a de Polignac number, because 121366661 - 2² = 121366657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121366669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 955580 + ... + 955706.

It is an arithmetic number, because the mean of its divisors is an integer number (4475520).

Almost surely, 2^121366661 is an apocalyptic number.

It is an amenable number.

121366661 is a deficient number, since it is larger than the sum of its proper divisors (21849979).

121366661 is a wasteful number, since it uses less digits than its factorization.

121366661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285.

The product of its digits is 7776, while the sum is 32.

The square root of 121366661 is about 11016.6538023122. The cubic root of 121366661 is about 495.1078376081.

The spelling of 121366661 in words is "one hundred twenty-one million, three hundred sixty-six thousand, six hundred sixty-one".