2066646466 has 4 divisors (see below), whose sum is σ = 3099969702. Its totient is φ = 1033323232.

The previous prime is 2066646457. The next prime is 2066646467. The reversal of 2066646466 is 6646466602.

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

It can be written as a sum of positive squares in only one way, i.e., 1980695025 + 85951441 = 44505^2 + 9271^2 .

It is not an unprimeable number, because it can be changed into a prime (2066646467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 516661615 + ... + 516661618.

Almost surely, 2^2066646466 is an apocalyptic number.

2066646466 is a deficient number, since it is larger than the sum of its proper divisors (1033323236).

2066646466 is a wasteful number, since it uses less digits than its factorization.

2066646466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033323235.

The product of its (nonzero) digits is 1492992, while the sum is 46.

The square root of 2066646466 is about 45460.3834783650. The cubic root of 2066646466 is about 1273.7632946884.

The spelling of 2066646466 in words is "two billion, sixty-six million, six hundred forty-six thousand, four hundred sixty-six".