16666249 has 8 divisors (see below), whose sum is σ = 17726240. Its totient is φ = 15624576.

The previous prime is 16666231. The next prime is 16666267. The reversal of 16666249 is 94266661.

It is an interprime number because it is at equal distance from previous prime (16666231) and next prime (16666267).

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

It is a cyclic number.

It is not a de Polignac number, because 16666249 - 2⁵ = 16666217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16666219) 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, 2679 + ... + 6364.

It is an arithmetic number, because the mean of its divisors is an integer number (2215780).

Almost surely, 2^16666249 is an apocalyptic number.

16666249 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16666249 is a deficient number, since it is larger than the sum of its proper divisors (1059991).

16666249 is an equidigital number, since it uses as much as digits as its factorization.

16666249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9159.

The product of its digits is 93312, while the sum is 40.

The square root of 16666249 is about 4082.4317508074. The cubic root of 16666249 is about 255.4343437007.

The spelling of 16666249 in words is "sixteen million, six hundred sixty-six thousand, two hundred forty-nine".