2066218654 has 4 divisors (see below), whose sum is σ = 3099327984. Its totient is φ = 1033109326.

The previous prime is 2066218601. The next prime is 2066218663. The reversal of 2066218654 is 4568126602.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2066218654² = 8538519052275143432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 516554662 + ... + 516554665.

It is an arithmetic number, because the mean of its divisors is an integer number (774831996).

Almost surely, 2^2066218654 is an apocalyptic number.

2066218654 is a deficient number, since it is larger than the sum of its proper divisors (1033109330).

2066218654 is a wasteful number, since it uses less digits than its factorization.

2066218654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033109329.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 2066218654 is about 45455.6779071658. The cubic root of 2066218654 is about 1273.6753956310.

The spelling of 2066218654 in words is "two billion, sixty-six million, two hundred eighteen thousand, six hundred fifty-four".