106669521 has 24 divisors (see below), whose sum is σ = 183831840. Its totient is φ = 60953256.

The previous prime is 106669517. The next prime is 106669531. The reversal of 106669521 is 125966601.

It is not a de Polignac number, because 106669521 - 2² = 106669517 is a prime.

It is a super-2 number, since 2×106669521² = 22756773420738882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (106669531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38991 + ... + 41636.

It is an arithmetic number, because the mean of its divisors is an integer number (7659660).

Almost surely, 2^106669521 is an apocalyptic number.

It is an amenable number.

106669521 is a deficient number, since it is larger than the sum of its proper divisors (77162319).

106669521 is an equidigital number, since it uses as much as digits as its factorization.

106669521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80650 (or 80637 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 106669521 is about 10328.0937737803. The cubic root of 106669521 is about 474.2566707939.

The spelling of 106669521 in words is "one hundred six million, six hundred sixty-nine thousand, five hundred twenty-one".