12066997 has 4 divisors (see below), whose sum is σ = 12361356. Its totient is φ = 11772640.

The previous prime is 12066979. The next prime is 12067001. The reversal of 12066997 is 79966021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1347921 + 10719076 = 1161^2 + 3274^2 .

It is a cyclic number.

It is not a de Polignac number, because 12066997 - 2¹⁵ = 12034229 is a prime.

It is a super-2 number, since 2×12066997² = 291224833196018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12066907) 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, 147118 + ... + 147199.

It is an arithmetic number, because the mean of its divisors is an integer number (3090339).

Almost surely, 2^12066997 is an apocalyptic number.

It is an amenable number.

12066997 is a deficient number, since it is larger than the sum of its proper divisors (294359).

12066997 is an equidigital number, since it uses as much as digits as its factorization.

12066997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294358.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 12066997 is about 3473.7583393207. The cubic root of 12066997 is about 229.3681270353.

The spelling of 12066997 in words is "twelve million, sixty-six thousand, nine hundred ninety-seven".