106663391 has 8 divisors (see below), whose sum is σ = 107474400. Its totient is φ = 105855840.

The previous prime is 106663387. The next prime is 106663399. The reversal of 106663391 is 193366601.

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 106663391 - 2² = 106663387 is a prime.

It is a super-2 number, since 2×106663391² = 22754157959237762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106663399) 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, 100001 + ... + 101061.

It is an arithmetic number, because the mean of its divisors is an integer number (13434300).

Almost surely, 2^106663391 is an apocalyptic number.

106663391 is a deficient number, since it is larger than the sum of its proper divisors (811009).

106663391 is a wasteful number, since it uses less digits than its factorization.

106663391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1729.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 106663391 is about 10327.7970061383. The cubic root of 106663391 is about 474.2475858836.

The spelling of 106663391 in words is "one hundred six million, six hundred sixty-three thousand, three hundred ninety-one".