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16664207 = 75344917
BaseRepresentation
bin111111100100…
…011010001111
31011100121222212
4333210122033
513231223312
61353101035
7261433460
oct77443217
934317885
1016664207
11945207a
1256b777b
1335b5ca1
1422dad67
1516e2822
hexfe468f

16664207 has 8 divisors (see below), whose sum is σ = 19404576. Its totient is φ = 14013792.

The previous prime is 16664203. The next prime is 16664231. The reversal of 16664207 is 70246661.

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 16664207 - 22 = 16664203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16664203) 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, 22088 + ... + 22829.

It is an arithmetic number, because the mean of its divisors is an integer number (2425572).

Almost surely, 216664207 is an apocalyptic number.

16664207 is a deficient number, since it is larger than the sum of its proper divisors (2740369).

16664207 is an equidigital number, since it uses as much as digits as its factorization.

16664207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44977.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 16664207 is about 4082.1816471098. The cubic root of 16664207 is about 255.4239110745.

The spelling of 16664207 in words is "sixteen million, six hundred sixty-four thousand, two hundred seven".

Divisors: 1 7 53 371 44917 314419 2380601 16664207