106665994 has 8 divisors (see below), whose sum is σ = 162190980. Its totient is φ = 52602336.

The previous prime is 106665991. The next prime is 106665997. The reversal of 106665994 is 499566601.

It is an interprime number because it is at equal distance from previous prime (106665991) and next prime (106665997).

It can be written as a sum of positive squares in 2 ways, for example, as 106357969 + 308025 = 10313^2 + 555^2 .

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

It is a super-2 number, since 2×106665994² = 22755268552016072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (106665991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365149 + ... + 365440.

Almost surely, 2^106665994 is an apocalyptic number.

106665994 is a deficient number, since it is larger than the sum of its proper divisors (55524986).

106665994 is an equidigital number, since it uses as much as digits as its factorization.

106665994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730664.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 106665994 is about 10327.9230245001. The cubic root of 106665994 is about 474.2514436784.

The spelling of 106665994 in words is "one hundred six million, six hundred sixty-five thousand, nine hundred ninety-four".