666025106 has 8 divisors (see below), whose sum is σ = 999295164. Its totient is φ = 332926720.

The previous prime is 666025103. The next prime is 666025121. The reversal of 666025106 is 601520666.

It can be written as a sum of positive squares in 2 ways, for example, as 621255625 + 44769481 = 24925^2 + 6691^2 .

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

It is a super-2 number, since 2×666025106² = 887178883644622472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666025103) 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, 32735 + ... + 49026.

Almost surely, 2^666025106 is an apocalyptic number.

666025106 is a deficient number, since it is larger than the sum of its proper divisors (333270058).

666025106 is a wasteful number, since it uses less digits than its factorization.

666025106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85836.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 666025106 is about 25807.4622154136. The cubic root of 666025106 is about 873.3001473641.

The spelling of 666025106 in words is "six hundred sixty-six million, twenty-five thousand, one hundred six".