156106061666 has 8 divisors (see below), whose sum is σ = 234992399724. Its totient is φ = 77775261760.

The previous prime is 156106061651. The next prime is 156106061669. The reversal of 156106061666 is 666160601651.

It can be written as a sum of positive squares in 2 ways, for example, as 133762090225 + 22343971441 = 365735^2 + 149479^2 .

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

It is not an unprimeable number, because it can be changed into a prime (156106061669) 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, 138883835 + ... + 138884958.

Almost surely, 2^156106061666 is an apocalyptic number.

156106061666 is a deficient number, since it is larger than the sum of its proper divisors (78886338058).

156106061666 is a wasteful number, since it uses less digits than its factorization.

156106061666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277769076.

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

The spelling of 156106061666 in words is "one hundred fifty-six billion, one hundred six million, sixty-one thousand, six hundred sixty-six".