121600666 has 16 divisors (see below), whose sum is σ = 199182240. Its totient is φ = 55217680.

The previous prime is 121600663. The next prime is 121600669. The reversal of 121600666 is 666006121.

It is an interprime number because it is at equal distance from previous prime (121600663) and next prime (121600669).

It is not an unprimeable number, because it can be changed into a prime (121600663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26640 + ... + 30868.

It is an arithmetic number, because the mean of its divisors is an integer number (12448890).

Almost surely, 2^121600666 is an apocalyptic number.

121600666 is a deficient number, since it is larger than the sum of its proper divisors (77581574).

121600666 is a wasteful number, since it uses less digits than its factorization.

121600666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 121600666 is about 11027.2691995797. The cubic root of 121600666 is about 495.4258363269.

Adding to 121600666 its reverse (666006121), we get a palindrome (787606787).

The spelling of 121600666 in words is "one hundred twenty-one million, six hundred thousand, six hundred sixty-six".