20155061066 has 16 divisors (see below), whose sum is σ = 34626493440. Its totient is φ = 8619143280.

The previous prime is 20155061011. The next prime is 20155061077. The reversal of 20155061066 is 66016055102.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1554986 + ... + 1567893.

It is an arithmetic number, because the mean of its divisors is an integer number (2164155840).

Almost surely, 2^20155061066 is an apocalyptic number.

20155061066 is a deficient number, since it is larger than the sum of its proper divisors (14471432374).

20155061066 is a wasteful number, since it uses less digits than its factorization.

20155061066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123349.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 20155061066 in words is "twenty billion, one hundred fifty-five million, sixty-one thousand, sixty-six".