5651655666 has 16 divisors (see below), whose sum is σ = 11494893600. Its totient is φ = 1851954848.

The previous prime is 5651655631. The next prime is 5651655707. The reversal of 5651655666 is 6665561565.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7982211 + ... + 7982918.

It is an arithmetic number, because the mean of its divisors is an integer number (718430850).

Almost surely, 2^5651655666 is an apocalyptic number.

5651655666 is an abundant number, since it is smaller than the sum of its proper divisors (5843237934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5651655666 is a wasteful number, since it uses less digits than its factorization.

5651655666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15965193.

The product of its digits is 4860000, while the sum is 51.

The square root of 5651655666 is about 75177.4944115591. The cubic root of 5651655666 is about 1781.2514519311.

The spelling of 5651655666 in words is "five billion, six hundred fifty-one million, six hundred fifty-five thousand, six hundred sixty-six".