1001655566 has 32 divisors (see below), whose sum is σ = 1656806400. Its totient is φ = 452057760.

The previous prime is 1001655559. The next prime is 1001655619. The reversal of 1001655566 is 6655561001.

1001655566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234740 + ... + 238968.

It is an arithmetic number, because the mean of its divisors is an integer number (51775200).

Almost surely, 2^1001655566 is an apocalyptic number.

1001655566 is a deficient number, since it is larger than the sum of its proper divisors (655150834).

1001655566 is a wasteful number, since it uses less digits than its factorization.

1001655566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 1001655566 is about 31648.9425731730. The cubic root of 1001655566 is about 1000.5515510688.

The spelling of 1001655566 in words is "one billion, one million, six hundred fifty-five thousand, five hundred sixty-six".