1661106064 has 10 divisors (see below), whose sum is σ = 3218393030. Its totient is φ = 830553024.

The previous prime is 1661106049. The next prime is 1661106089. The reversal of 1661106064 is 4606011661.

It can be written as a sum of positive squares in only one way, i.e., 1647710464 + 13395600 = 40592^2 + 3660^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51909549 + ... + 51909580.

It is an arithmetic number, because the mean of its divisors is an integer number (321839303).

Almost surely, 2^1661106064 is an apocalyptic number.

It is an amenable number.

1661106064 is a deficient number, since it is larger than the sum of its proper divisors (1557286966).

1661106064 is a wasteful number, since it uses less digits than its factorization.

1661106064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103819137 (or 103819131 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1661106064 is about 40756.6689512281. The cubic root of 1661106064 is about 1184.3110676768.

The spelling of 1661106064 in words is "one billion, six hundred sixty-one million, one hundred six thousand, sixty-four".