2066206651 has 4 divisors (see below), whose sum is σ = 2122050112. Its totient is φ = 2010363192.

The previous prime is 2066206607. The next prime is 2066206663. The reversal of 2066206651 is 1566026602.

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

It is a cyclic number.

It is not a de Polignac number, because 2066206651 - 2⁷ = 2066206523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066206601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27921675 + ... + 27921748.

It is an arithmetic number, because the mean of its divisors is an integer number (530512528).

Almost surely, 2^2066206651 is an apocalyptic number.

2066206651 is a deficient number, since it is larger than the sum of its proper divisors (55843461).

2066206651 is an equidigital number, since it uses as much as digits as its factorization.

2066206651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55843460.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 2066206651 is about 45455.5458772634. The cubic root of 2066206651 is about 1273.6729292971.

The spelling of 2066206651 in words is "two billion, sixty-six million, two hundred six thousand, six hundred fifty-one".