2066105651 has 4 divisors (see below), whose sum is σ = 2070587904. Its totient is φ = 2061623400.

The previous prime is 2066105633. The next prime is 2066105653. The reversal of 2066105651 is 1565016602.

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 2066105651 - 2²⁶ = 1998996787 is a prime.

It is a super-2 number, since 2×2066105651² = 8537585122188267602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066105653) 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, 2240435 + ... + 2241356.

It is an arithmetic number, because the mean of its divisors is an integer number (517646976).

Almost surely, 2^2066105651 is an apocalyptic number.

2066105651 is a deficient number, since it is larger than the sum of its proper divisors (4482253).

2066105651 is an equidigital number, since it uses as much as digits as its factorization.

2066105651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482252.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 2066105651 is about 45454.4348881383. The cubic root of 2066105651 is about 1273.6521757967.

The spelling of 2066105651 in words is "two billion, sixty-six million, one hundred five thousand, six hundred fifty-one".