666951146 has 8 divisors (see below), whose sum is σ = 1000584900. Its totient is φ = 333422848.

The previous prime is 666951133. The next prime is 666951149. The reversal of 666951146 is 641159666.

It can be written as a sum of positive squares in 2 ways, for example, as 656640625 + 10310521 = 25625^2 + 3211^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 666951097 and 666951106.

It is not an unprimeable number, because it can be changed into a prime (666951149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7991 + ... + 37386.

Almost surely, 2^666951146 is an apocalyptic number.

666951146 is a deficient number, since it is larger than the sum of its proper divisors (333633754).

666951146 is a wasteful number, since it uses less digits than its factorization.

666951146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52728.

The product of its digits is 233280, while the sum is 44.

The square root of 666951146 is about 25825.3973057531. The cubic root of 666951146 is about 873.7047048602.

The spelling of 666951146 in words is "six hundred sixty-six million, nine hundred fifty-one thousand, one hundred forty-six".