1666925584 has 45 divisors (see below), whose sum is σ = 3304436413. Its totient is φ = 814600256.

The previous prime is 1666925567. The next prime is 1666925587. The reversal of 1666925584 is 4855296661.

The square root of 1666925584 is 40828.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1516323600 + 150601984 = 38940^2 + 12272^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1666925587) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9635322 + ... + 9635494.

Almost surely, 2^1666925584 is an apocalyptic number.

1666925584 is the 40828-th square number.

It is an amenable number.

1666925584 is a deficient number, since it is larger than the sum of its proper divisors (1637510829).

1666925584 is an frugal number, since it uses more digits than its factorization.

1666925584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 234 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 52.

The cubic root of 1666925584 is about 1185.6924944063.

The spelling of 1666925584 in words is "one billion, six hundred sixty-six million, nine hundred twenty-five thousand, five hundred eighty-four".