16666297 has 4 divisors (see below), whose sum is σ = 16678116. Its totient is φ = 16654480.

The previous prime is 16666291. The next prime is 16666303. The reversal of 16666297 is 79266661.

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

It is an interprime number because it is at equal distance from previous prime (16666291) and next prime (16666303).

It can be written as a sum of positive squares in 2 ways, for example, as 4247721 + 12418576 = 2061^2 + 3524^2 .

It is a cyclic number.

It is not a de Polignac number, because 16666297 - 2³ = 16666289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16666291) 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, 3454 + ... + 6727.

It is an arithmetic number, because the mean of its divisors is an integer number (4169529).

Almost surely, 2^16666297 is an apocalyptic number.

It is an amenable number.

16666297 is a deficient number, since it is larger than the sum of its proper divisors (11819).

16666297 is a wasteful number, since it uses less digits than its factorization.

16666297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11818.

The product of its digits is 163296, while the sum is 43.

The square root of 16666297 is about 4082.4376296522. The cubic root of 16666297 is about 255.4345889235.

The spelling of 16666297 in words is "sixteen million, six hundred sixty-six thousand, two hundred ninety-seven".