16690251 has 8 divisors (see below), whose sum is σ = 22535680. Its totient is φ = 10985832.

The previous prime is 16690241. The next prime is 16690253. The reversal of 16690251 is 15209661.

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

It is not a de Polignac number, because 16690251 - 2¹⁰ = 16689227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16690253) 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, 34975 + ... + 35448.

It is an arithmetic number, because the mean of its divisors is an integer number (2816960).

Almost surely, 2^16690251 is an apocalyptic number.

16690251 is a deficient number, since it is larger than the sum of its proper divisors (5845429).

16690251 is an equidigital number, since it uses as much as digits as its factorization.

16690251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70505.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 16690251 is about 4085.3703626477. The cubic root of 16690251 is about 255.5569066581.

The spelling of 16690251 in words is "sixteen million, six hundred ninety thousand, two hundred fifty-one".