1662566428 has 24 divisors (see below), whose sum is σ = 2986502400. Its totient is φ = 809544048.

The previous prime is 1662566393. The next prime is 1662566429. The reversal of 1662566428 is 8246652661.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662566429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7668 + ... + 58171.

It is an arithmetic number, because the mean of its divisors is an integer number (124437600).

Almost surely, 2^1662566428 is an apocalyptic number.

It is an amenable number.

1662566428 is a deficient number, since it is larger than the sum of its proper divisors (1323935972).

1662566428 is a wasteful number, since it uses less digits than its factorization.

1662566428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66009 (or 66007 counting only the distinct ones).

The product of its digits is 829440, while the sum is 46.

The square root of 1662566428 is about 40774.5806600142. The cubic root of 1662566428 is about 1184.6580289967.

The spelling of 1662566428 in words is "one billion, six hundred sixty-two million, five hundred sixty-six thousand, four hundred twenty-eight".