12151666 has 8 divisors (see below), whose sum is σ = 18322524. Its totient is φ = 6044160.

The previous prime is 12151661. The next prime is 12151679. The reversal of 12151666 is 66615121.

It can be written as a sum of positive squares in 2 ways, for example, as 10272025 + 1879641 = 3205^2 + 1371^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12151661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15355 + ... + 16126.

Almost surely, 2^12151666 is an apocalyptic number.

12151666 is a deficient number, since it is larger than the sum of its proper divisors (6170858).

12151666 is a wasteful number, since it uses less digits than its factorization.

12151666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31676.

The product of its digits is 2160, while the sum is 28.

The square root of 12151666 is about 3485.9239808120. The cubic root of 12151666 is about 229.9033368223.

Adding to 12151666 its reverse (66615121), we get a palindrome (78766787).

The spelling of 12151666 in words is "twelve million, one hundred fifty-one thousand, six hundred sixty-six".