1666055056 has 40 divisors (see below), whose sum is σ = 3303029664. Its totient is φ = 813876480.

The previous prime is 1666055047. The next prime is 1666055087. The reversal of 1666055056 is 6505506661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118311 + ... + 131641.

Almost surely, 2^1666055056 is an apocalyptic number.

1666055056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1666055056 is a deficient number, since it is larger than the sum of its proper divisors (1636974608).

1666055056 is a wasteful number, since it uses less digits than its factorization.

1666055056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13519 (or 13513 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 1666055056 is about 40817.3376887812. The cubic root of 1666055056 is about 1185.4860548271.

The spelling of 1666055056 in words is "one billion, six hundred sixty-six million, fifty-five thousand, fifty-six".