2066721164 has 6 divisors (see below), whose sum is σ = 3616762044. Its totient is φ = 1033360580.

The previous prime is 2066721149. The next prime is 2066721187. The reversal of 2066721164 is 4611276602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258340142 + ... + 258340149.

It is an arithmetic number, because the mean of its divisors is an integer number (602793674).

Almost surely, 2^2066721164 is an apocalyptic number.

It is an amenable number.

2066721164 is a deficient number, since it is larger than the sum of its proper divisors (1550040880).

2066721164 is a wasteful number, since it uses less digits than its factorization.

2066721164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516680295 (or 516680293 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 2066721164 is about 45461.2050434214. The cubic root of 2066721164 is about 1273.7786410358.

Adding to 2066721164 its reverse (4611276602), we get a palindrome (6677997766).

The spelling of 2066721164 in words is "two billion, sixty-six million, seven hundred twenty-one thousand, one hundred sixty-four".