666061156 has 24 divisors (see below), whose sum is σ = 1239590520. Its totient is φ = 312064512.

The previous prime is 666061147. The next prime is 666061171. The reversal of 666061156 is 651160666.

666061156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 189337600 + 476723556 = 13760^2 + 21834^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5815 + ... + 36958.

It is an arithmetic number, because the mean of its divisors is an integer number (51649605).

Almost surely, 2^666061156 is an apocalyptic number.

It is an amenable number.

666061156 is a deficient number, since it is larger than the sum of its proper divisors (573529364).

666061156 is a wasteful number, since it uses less digits than its factorization.

666061156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43023 (or 43021 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 666061156 is about 25808.1606473611. The cubic root of 666061156 is about 873.3159034780.

The spelling of 666061156 in words is "six hundred sixty-six million, sixty-one thousand, one hundred fifty-six".