1661027344 has 20 divisors (see below), whose sum is σ = 3238743724. Its totient is φ = 825222528.

The previous prime is 1661027339. The next prime is 1661027359. The reversal of 1661027344 is 4437201661.

It can be written as a sum of positive squares in 2 ways, for example, as 227647744 + 1433379600 = 15088^2 + 37860^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328107 + ... + 333130.

Almost surely, 2^1661027344 is an apocalyptic number.

It is an amenable number.

1661027344 is a deficient number, since it is larger than the sum of its proper divisors (1577716380).

1661027344 is a wasteful number, since it uses less digits than its factorization.

1661027344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661402 (or 661396 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 1661027344 is about 40755.7032082628. The cubic root of 1661027344 is about 1184.2923591705.

Adding to 1661027344 its product of nonzero digits (24192), we get a square (1661051536 = 40756²).

It can be divided in two parts, 16 and 61027344, that multiplied together give a square (976437504 = 31248²).

The spelling of 1661027344 in words is "one billion, six hundred sixty-one million, twenty-seven thousand, three hundred forty-four".