121707666 has 12 divisors (see below), whose sum is σ = 263699982. Its totient is φ = 40569216.

The previous prime is 121707653. The next prime is 121707679. The reversal of 121707666 is 666707121.

It is an interprime number because it is at equal distance from previous prime (121707653) and next prime (121707679).

It can be written as a sum of positive squares in only one way, i.e., 112975641 + 8732025 = 10629^2 + 2955^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121707666.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3380751 + ... + 3380786.

Almost surely, 2^121707666 is an apocalyptic number.

121707666 is an abundant number, since it is smaller than the sum of its proper divisors (141992316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121707666 is a wasteful number, since it uses less digits than its factorization.

121707666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6761545 (or 6761542 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 121707666 is about 11032.1197419172. The cubic root of 121707666 is about 495.5711069774.

The spelling of 121707666 in words is "one hundred twenty-one million, seven hundred seven thousand, six hundred sixty-six".