665156106 has 24 divisors (see below), whose sum is σ = 1441649664. Its totient is φ = 221645160.

The previous prime is 665156087. The next prime is 665156111. The reversal of 665156106 is 601651566.

665156106 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92791 + ... + 99701.

It is an arithmetic number, because the mean of its divisors is an integer number (60068736).

Almost surely, 2^665156106 is an apocalyptic number.

665156106 is an abundant number, since it is smaller than the sum of its proper divisors (776493558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665156106 is a wasteful number, since it uses less digits than its factorization.

665156106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12266 (or 12263 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 665156106 is about 25790.6205043617. The cubic root of 665156106 is about 872.9201676309.

The spelling of 665156106 in words is "six hundred sixty-five million, one hundred fifty-six thousand, one hundred six".