6650166555 has 16 divisors (see below), whose sum is σ = 11822518560. Its totient is φ = 3546755424.

The previous prime is 6650166553. The next prime is 6650166559. The reversal of 6650166555 is 5556610566.

It is not a de Polignac number, because 6650166555 - 2¹ = 6650166553 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6650166555.

It is not an unprimeable number, because it can be changed into a prime (6650166553) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 24630112 + ... + 24630381.

It is an arithmetic number, because the mean of its divisors is an integer number (738907410).

Almost surely, 2^6650166555 is an apocalyptic number.

6650166555 is a deficient number, since it is larger than the sum of its proper divisors (5172352005).

6650166555 is a wasteful number, since it uses less digits than its factorization.

6650166555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49260507 (or 49260501 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The square root of 6650166555 is about 81548.5533593331. The cubic root of 6650166555 is about 1880.5180550392.

The spelling of 6650166555 in words is "six billion, six hundred fifty million, one hundred sixty-six thousand, five hundred fifty-five".