2066566658 has 16 divisors (see below), whose sum is σ = 3363788736. Its totient is φ = 946517520.

The previous prime is 2066566657. The next prime is 2066566669. The reversal of 2066566658 is 8566656602.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2066566657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299966 + ... + 306777.

It is an arithmetic number, because the mean of its divisors is an integer number (210236796).

Almost surely, 2^2066566658 is an apocalyptic number.

2066566658 is a deficient number, since it is larger than the sum of its proper divisors (1297222078).

2066566658 is a wasteful number, since it uses less digits than its factorization.

2066566658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606889.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The square root of 2066566658 is about 45459.5056946289. The cubic root of 2066566658 is about 1273.7468981072.

The spelling of 2066566658 in words is "two billion, sixty-six million, five hundred sixty-six thousand, six hundred fifty-eight".